mesa: fix renderbuffer leak

We don't need to call _mesa_reference_renderbuffer() for the first
assignment as refCount starts at 1. For swrast we work around the
fact we will indirectly call _mesa_reference_renderbuffer() by
resetting refCount to 0.

Fixes: 32141e53d1520 (mesa: tidy up renderbuffer RefCount initialisation)

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
2 files changed