small error corrections

src/gameplay/frames/nextFrameBuffer.java

@@ -40,8 +40,13 @@ public class nextFrameBuffer {
 	}
 	
 	public void goToNext() {
-		this.current = this.next.current;
-		this.next = this.next.next;
+		try {
+			this.current = this.next.current;
+			this.next = this.next.next;
+		} catch (NullPointerException n) {
+			this.setCurrentFrame(null);
+			this.setNext(new nextFrameBuffer());
+		}
 	}
 	
 	public Frame getCurrentFrame() {