Possible bug: DoF (GLSL 1.5) + MSAA

Your changes fix the compiling crash, but now I have a new problem (it worked before the fix):
It seems that the color buffer or something is not cleared if the bloom filter is activated and MSAA is greater than 1. As you can see in the screenshot it looks strange. I have tried almost all I know but I can not reproduce the problem in the test case and I can not find the trigger of this problem in my game. Has someone an idea?

http://alrik-online.de/alrik/screens/javaw%202015-05-13%2015-35-36-66.png