FBO tweaks. Release multisample fbo in LLPipeline::releaseScreenBuffers, and fixed LLRenderBuffer::mInternalFormat falling out of sync with LLRenderBuffer::mTex.

indra/llrender/llrendertarget.cpp

@@ -793,6 +793,7 @@ bool LLMultisampleBuffer::addColorAttachment(U32 color_fmt)
 	}
 
 	mTex.push_back(tex);
+	mInternalFormat.push_back(color_fmt);
 	return true;
 }
 

indra/newview/pipeline.cpp

@@ -693,6 +693,7 @@ bool LLPipeline::allocateScreenBuffer(U32 resX, U32 resY, U32 samples)
 	}
 
 	mSampleBuffer.release();
+	mScreen.release();
 
 	if (LLPipeline::sRenderDeferred)
 	{
@@ -906,6 +907,8 @@ void LLPipeline::releaseScreenBuffers()
 	{
 		mShadow[i].release();
 	}
+
+	mSampleBuffer.release();
 }