Use xine's inttypes.
The file config_types.h is generated from config_types.h.in in musepack SVN.

Index: src/libmusepack/musepack/config_types.h
===================================================================
RCS file: /home/valtri/CVS/xine-lib/src/libmusepack/musepack/config_types.h,v
retrieving revision 1.1.1.2
diff -u -p -u -p -r1.1.1.2 config_types.h
--- src/libmusepack/musepack/config_types.h	3 Feb 2005 00:19:24 -0000	1.1.1.2
+++ src/libmusepack/musepack/config_types.h	3 Feb 2005 00:21:06 -0000
@@ -1,7 +1,7 @@
 #ifndef __CONFIG_TYPES_H__
 #define __CONFIG_TYPES_H__
 
-#include <stdint.h>
+#include "os_types.h"
 
 #ifdef WORDS_BIGENDIAN
   #undef MPC_LITTLE_ENDIAN