The assert for popRenderTarget in kwinshadereffect caused the kwin freezes as if assert has not been compiled in, the fbo will never be detached. So now we have working looking glass and sharpen effect back.

BUG: 183981

svn path=/trunk/KDE/kdebase/workspace/; revision=960039

lib/kwinshadereffect.cpp

@@ -151,7 +151,8 @@ void ShaderEffect::postPaintScreen()
     if( mValid && mEnabled )
     {
         // Disable render texture
-        assert( effects->popRenderTarget() == mRenderTarget );
+        GLRenderTarget* target = effects->popRenderTarget();
+        assert( target == mRenderTarget );
         mTexture->bind();
 
         // Use the shader