Make handle id semantics more like file id. This may need to be revisited if we ever start storing long lived things on the buffer (if an item lives through 32k other items coming and going, there will be an id collision and things will break)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15437 a1c6a512-1295-4272-9138-f99709370657

apps/buffering.h

@@ -65,6 +65,7 @@ bool buffering_reset(char *buf, size_t buflen);
  * amount of data is ready (unless EOF is reached).
  ****************************************************************************/
 
+#define BUF_HANDLE_ID_MASK      0x7FFF
 #define BUF_MAX_HANDLES         256
 
 int bufopen(const char *file, size_t offset, enum data_type type);