ALL: Remove trailing whitespaces

This tries to make our code a bit more compliant with our code formatting
conventions. For future use, this is the command I used:
  git ls-files "*.cpp" "*.h" | xargs sed -i -e 's/[ \t]*$//'

engines/sword2/animation.cpp

@@ -296,7 +296,7 @@ bool MoviePlayer::playVideo() {
 				uint32 minWeight = 0xFFFFFFFF;
 				uint32 weight;
 				byte r, g, b;
-				
+
 				const byte *palette = _decoder->getPalette();
 
 				for (int i = 0; i < 256; i++) {