minor fixes in drivers mpc and vorbis.

drivers/mpc/mpc_reader.c

@@ -36,6 +36,7 @@
 #include <mpc/reader.h>
 #include "internal.h"
 #include <stdio.h>
+#include <string.h> // memset()
 
 #define STDIO_MAGIC 0xF34B963C ///< Just a random safe-check value...
 typedef struct mpc_reader_stdio_t {

drivers/vorbis/psy.c

@@ -1160,7 +1160,7 @@ void _vp_couple_quantize_normalize(int blobno,
                     However, this is a temporary patch.
                     by Aoyumi @ 2004/04/18
                 */
-                /*float derate = (1.0 - de*((float)(j-limit+i) / (float)(n-limit)));
+                /*float derate = (1.0 - de*((float)(j-limit+i) / (float)(n-limit))); */
                 /* elliptical 
                 if(reM[j]+reA[j]<0){
                   reM[j] = - (qeM[j] = (fabs(reM[j])+fabs(reA[j]))*derate*derate);