egl: define vsnprintf

include/EGL/eglplatform.h

@@ -61,6 +61,7 @@ typedef unsigned long u_int32_t;
 typedef unsigned char uint8_t;
 #define snprintf _snprintf
 #define strcasecmp _stricmp
+#define vsnprintf _vsnprintf
 
 typedef HDC		NativeDisplayType;
 typedef HWND	NativeWindowType;