Fix buffer size used for realpath() call

Thanks to kugel for pointing this out.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29320 a1c6a512-1295-4272-9138-f99709370657

apps/tagcache.c

@@ -445,7 +445,7 @@ static long find_entry_disk(const char *filename_raw, bool localfd)
 
     const char *filename = filename_raw;
 #ifdef APPLICATION
-    char pathbuf[MAX_PATH];
+    char pathbuf[PATH_MAX]; /* Note: Don't use MAX_PATH here, it's too small */
     if (realpath(filename, pathbuf) == pathbuf)
         filename = pathbuf;
 #endif