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]*$//'

graphics/jpeg.h

@@ -72,7 +72,7 @@ private:
 		// Result image for this component
 		Surface surface;
 	};
-	
+
 	Component *_components;
 
 	// Scan components