fix msvc compile

contrib/mpeg_encode/headers/general.h

@@ -149,8 +149,8 @@ typedef int int32;
 #define max(a,b) ((a) > (b) ? (a) : (b))
 #undef min
 #define min(a,b) ((a) < (b) ? (a) : (b))
-#undef abs
-#define abs(a) ((a) >= 0 ? (a) : -(a))
+//#undef abs
+//#define abs(a) ((a) >= 0 ? (a) : -(a))
 
 
 #endif

contrib/mpeg_encode/pframe.cpp

@@ -126,7 +126,7 @@
  *==============*/
 
 #include <assert.h>
-#include <sys/param.h>
+//#include <sys/param.h>
 #include "all.h"
 #include "mtypes.h"
 #include "bitio.h"

contrib/mpeg_encode/readframe.cpp

@@ -124,7 +124,7 @@
 #include <errno.h>
 #include <ctype.h>
 #include <string.h>
-#include <unistd.h>
+//#include <unistd.h>
 #include "mtypes.h"
 #include "frames.h"
 #include "prototypes.h"