fix windows compile issue

src/drivers/win/video.cpp

@@ -424,6 +424,11 @@ int SetVideoMode(int fs)
         return 1;
 }
 
+//draw input aids if we are fullscreen
+bool FCEUD_ShouldDrawInputAids()
+{
+	return fullscreen!=0;
+}
 
 static void BlitScreenWindow(uint8 *XBuf);
 static void BlitScreenFull(uint8 *XBuf);