cairo 0.5; make sure math.h is included early with right win32 define

gfx/cairo/cairo/src/cairoint.h

@@ -50,16 +50,15 @@
 #include "config.h"
 #endif
 
+#define _USE_MATH_DEFINES
+#include <math.h>
+
+#include <limits.h>
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 
-#ifdef _MSC_VER
-#define _USE_MATH_DEFINES
-#endif
-#include <math.h>
-#include <limits.h>
 #include <stdio.h>
 
 #include "cairo.h"