Set proper image name for volume slider

AspenProject/VLCMovieViewController.m

@@ -149,7 +149,7 @@
     }
     [volumeSlider setMinimumTrackImage:[[UIImage imageNamed:@"sliderminiValue"]resizableImageWithCapInsets:UIEdgeInsetsMake(0, 4, 0, 0)] forState:UIControlStateNormal];
     [volumeSlider setMaximumTrackImage:[[UIImage imageNamed:@"slidermaxValue"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 4)] forState:UIControlStateNormal];
-    [volumeSlider setThumbImage:[UIImage imageNamed:@"ballslidernew"] forState:UIControlStateNormal];
+    [volumeSlider setThumbImage:[UIImage imageNamed:@"volumeballslider"] forState:UIControlStateNormal];
     [volumeSlider addTarget:self
                      action:@selector(volumeSliderAction:)
            forControlEvents:UIControlEventValueChanged];