Correcting un-returned depth size in utility function.

TRAC #11333
Implemented during masking conformance testing.

Author: Shannon Woods
Signed-off-by: Andrew Lewycky
Signed-off-by: Daniel Koch

git-svn-id: https://angleproject.googlecode.com/svn/trunk@29 736b8ea6-26fd-11df-bfd4-992fa37f6226

libGLESv2/Renderbuffer.cpp

@@ -206,7 +206,7 @@ GLuint Depthbuffer::getDepthSize()
         D3DSURFACE_DESC description;
         mDepthStencil->GetDesc(&description);
 
-        es2dx::GetDepthSize(description.Format);
+        return es2dx::GetDepthSize(description.Format);
     }
 
     return 0;