very minor compile speed improvements

src/modules/image/CompressedImageData.cpp

@@ -19,6 +19,7 @@
  **/
 
 #include "CompressedImageData.h"
+#include "common/Exception.h"
 
 namespace love
 {

src/modules/image/FormatHandler.h

@@ -26,6 +26,8 @@
 #include "common/pixelformat.h"
 #include "CompressedSlice.h"
 
+#include <vector>
+
 namespace love
 {
 namespace image