fixes compilation with gcc4

merged from cvs, more details at:
http://sourceforge.net/tracker/index.php?func=detail&aid=1235212&group_id=108675&atid=651197

===================================================================
RCS file: /cvsroot/pearpc/pearpc/src/io/prom/fs/hfsplus/swab.h,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- pearpc/pearpc/src/io/prom/fs/hfsplus/swab.h	2004/11/04 23:10:30	1.2
+++ pearpc/pearpc/src/io/prom/fs/hfsplus/swab.h	2005/07/22 00:59:44	1.3
@@ -38,13 +38,13 @@
 
 #define bswabU16(val) bswap_16(val)
 
-#define bswabU16_inc(ptr) bswap_16(*((UInt16*) (ptr))++)
-#define bswabU32_inc(ptr) bswap_32(*((UInt32*) (ptr))++)
-#define bswabU64_inc(ptr) bswap_64(*((APPLEUInt64*) (ptr))++)
-
-#define bstoreU16_inc(ptr, val) (*((UInt16*) (ptr))++) = bswap_16(val)
-#define bstoreU32_inc(ptr, val) (*((UInt32*) (ptr))++) = bswap_32(val)
-#define bstoreU64_inc(ptr, val) (*((APPLEUInt64*) (ptr))++) = bswap_64(val)
+#define bswabU16_inc(ptr) bswap_16(*(*((UInt16**) (void *)(ptr)))++)
+#define bswabU32_inc(ptr) bswap_32(*(*((UInt32**) (void *)(ptr)))++)
+#define bswabU64_inc(ptr) bswap_64(*(*((APPLEUInt64**) (void *)(ptr)))++)
+
+#define bstoreU16_inc(ptr, val) (*(*((UInt16**) (void *)(ptr)))++) = bswap_16(val)
+#define bstoreU32_inc(ptr, val) (*(*((UInt32**) (void *)(ptr)))++) = bswap_32(val)
+#define bstoreU64_inc(ptr, val) (*(*((APPLEUInt64**) (void *)(ptr)))++) = bswap_64(val)
 
 /*#else // BYTE_ORDER == BIG_ENDIAN
 
@@ -61,5 +61,5 @@
 #endif*/
 
 /* for the sake of completeness and readability */
-#define bswabU8_inc(ptr)	(*((UInt8*) (ptr))++)
-#define bstoreU8_inc(ptr,val)	(*((UInt8*) (ptr))++) = val
+#define bswabU8_inc(ptr)       (*(*((UInt8**) (void *)(ptr)))++)
+#define bstoreU8_inc(ptr,val)  (*(*((UInt8**) (void *)(ptr)))++) = val
===================================================================
RCS file: /cvsroot/pearpc/pearpc/src/io/prom/fs/hfsplus/btree.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- pearpc/pearpc/src/io/prom/fs/hfsplus/btree.c	2005/04/13 23:51:15	1.3
+++ pearpc/pearpc/src/io/prom/fs/hfsplus/btree.c	2005/07/22 00:59:44	1.4
@@ -364,7 +364,7 @@
 /** intialize the btree with the first entry in the fork */
 static int btree_init(btree* bt, volume* vol, hfsp_fork_raw* fork)
 { 
-    void		*p;
+    char		*p;
     char		buf[vol->blksize]; 
     UInt16		node_size;
     btree_node_desc*	node = &bt->head_node;
@@ -396,7 +396,7 @@
 	{
 	    p = volume_readfromfork(vol, nodebuf, fork, 0, bt->blkpernode,
 		 HFSP_EXTENT_DATA, bt->cnid);
-	    ((char*) p) += HEADER_RESERVEDOFFSET; // skip header
+	    p += HEADER_RESERVEDOFFSET; // skip header
 	}
 	
 	bt->alloc_bits = malloc(alloc_size);
===================================================================
RCS file: /cvsroot/pearpc/pearpc/src/io/prom/fs/hfsplus/volume.c,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -r1.6 -r1.7
--- pearpc/pearpc/src/io/prom/fs/hfsplus/volume.c	2005/04/13 23:51:15	1.6
+++ pearpc/pearpc/src/io/prom/fs/hfsplus/volume.c	2005/07/22 00:59:44	1.7
@@ -344,7 +344,7 @@
 
 /* Read the volume from the given buffer and swap the bytes.
  */
-static int volume_readbuf(hfsp_vh* vh, void* p)
+static int volume_readbuf(hfsp_vh* vh, char* p)
 {
     if ( (vh->signature	= bswabU16_inc(p)) != HFSP_VOLHEAD_SIG) 
 	HFSP_ERROR(-1, "This is not a HFS+ volume");
@@ -368,7 +368,7 @@
     vh->write_count	= bswabU32_inc(p);
     vh->encodings_bmp	= bswabU64_inc(p);
     memcpy(vh->finder_info, p, 32); 
-    ((char*) p) += 32; // finderinfo is not used by now
+    p += 32; // finderinfo is not used by now
     p = volume_readfork(p, &vh->alloc_file );
     p = volume_readfork(p, &vh->ext_file   );
     p = volume_readfork(p, &vh->cat_file   );
@@ -381,7 +381,7 @@
 	
 /* Write the volume to the given buffer and swap the bytes.
  */
-static int volume_writebuf(hfsp_vh* vh, void* p)
+static int volume_writebuf(hfsp_vh* vh, char* p)
 {
     bstoreU16_inc(p, vh->signature	);
     bstoreU16_inc(p, vh->version	);
@@ -404,7 +404,7 @@
     bstoreU32_inc(p, vh->write_count	);
     bstoreU64_inc(p, vh->encodings_bmp	);
     memcpy(p, vh->finder_info, 32); 
-    ((char*) p) += 32; // finderinfo is not used by now
+    p += 32; // finderinfo is not used by now
     p = volume_writefork(p, &vh->alloc_file );
     p = volume_writefork(p, &vh->ext_file   );
     p = volume_writefork(p, &vh->cat_file   );
@@ -427,7 +427,7 @@
 {
     UInt16  signature;
     char    buf[vol->blksize];
-    void    *p = buf;
+    char    *p = buf;
     if( volume_readinbuf(vol, buf, 2) ) // Wrapper or volume header starts here
         return -1;
 
@@ -440,12 +440,12 @@
   
 	UInt16	embeds, embedl;		/* Start/lenght of embedded area in blocks */
 	
-	((char*) p) += 0x12;		/* skip unneeded HFS vol fields */
+	p += 0x12;			/* skip unneeded HFS vol fields */
 	drAlBlkSiz = bswabU32_inc(p);	/* offset 0x14 */
-	((char*) p) += 0x4;		/* skip unneeded HFS vol fields */
+	p += 0x4;			/* skip unneeded HFS vol fields */
 	drAlBlSt    = bswabU16_inc(p);	/* offset 0x1C */
 	
-	((char*) p) += 0x5E;		/* skip unneeded HFS vol fields */
+	p += 0x5E;			/* skip unneeded HFS vol fields */
 	signature = bswabU16_inc(p);	/* offset 0x7C, drEmbedSigWord */
 	if (signature != HFSP_VOLHEAD_SIG)
 	    HFSP_ERROR(-1, "This looks like a normal HFS volume");