(svn r3448) - Fix: wrap up some MinGW warnings

music/dmusic.cpp

@@ -118,7 +118,7 @@ static void DMusicMidiStop(void)
 	if (performance != NULL) performance->Stop(NULL, NULL, 0, 0);
 
 	if (segment != NULL) {
-		segment->SetParam(GUID_Unload, -1, 0, 0, performance);
+		segment->SetParam(GUID_Unload, 0xFFFFFFFF, 0, 0, performance);
 		segment->Release();
 		segment = NULL;
 	}

stdafx.h

@@ -174,7 +174,7 @@ typedef unsigned char byte;
 #endif
 
 // This is already defined in unix
-#if !defined(UNIX) && !defined(__CYGWIN__) && !defined(__BEOS__)
+#if !defined(UNIX) && !defined(__CYGWIN__) && !defined(__BEOS__) && !defined(__MINGW32__)
   typedef unsigned int uint;
 #endif
 // Not defined in QNX Neutrino (6.x)