Index: libmpc/trunk/libmpcdec/internal.h
===================================================================
--- libmpc/trunk/libmpcdec/internal.h	(revision 434)
+++ libmpc/trunk/libmpcdec/internal.h	(revision 436)
@@ -84,4 +84,16 @@
 };
 
+/**
+ * checks if a block key is valid
+ * @param key the two caracters key to check
+ * @return MPC_STATUS_INVALIDSV if the key is invalid, MPC_STATUS_OK else
+ */
+static mpc_inline mpc_status mpc_check_key(char * key)
+{
+	if (key[0] < 65 || key[0] > 90 || key[1] < 65 || key[1] > 90)
+		return MPC_STATUS_INVALIDSV;
+	return MPC_STATUS_OK;
+}
+
 /// helper functions used by multiple files
 mpc_uint32_t mpc_random_int(mpc_decoder *d); // in synth_filter.c
Index: libmpc/trunk/libmpcdec/mpc_demux.c
===================================================================
--- libmpc/trunk/libmpcdec/mpc_demux.c	(revision 434)
+++ libmpc/trunk/libmpcdec/mpc_demux.c	(revision 436)
@@ -112,16 +112,4 @@
 
 	return (mpc_uint32_t) -1;
-}
-
-/**
- * checks if a block key is valid
- * @param key the two caracters key to check
- * @return MPC_STATUS_INVALIDSV if the key is invalid, MPC_STATUS_OK else
- */
-static mpc_inline mpc_status mpc_check_key(char * key)
-{
-	if (key[0] < 65 || key[0] > 90 || key[1] < 65 || key[1] > 90)
-		return MPC_STATUS_INVALIDSV;
-	return MPC_STATUS_OK;
 }