Minor changes.

- Replaced duplicate GameImage.process_sub() calls from related images with calling a single method, for easier editing.
- Suppress warnings from overwritten Slick2D classes.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/org/newdawn/slick/openal/SoundStore.java

@@ -52,6 +52,7 @@ import org.newdawn.slick.util.ResourceLoader;
  * @author Kevin Glass
  * @author Rockstar setVolume cleanup 
  */
+@SuppressWarnings({"rawtypes", "unchecked", "unused"})
 public class SoundStore {
 	
 	/** The single instance of this class */
@@ -318,7 +319,8 @@ public class SoundStore {
 		inited = true;
 		
 		AccessController.doPrivileged(new PrivilegedAction() {
-            public Object run() {
+			@Override
+			public Object run() {
 				try {
 					AL.create();
 					soundWorks = true;