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32a0f88b04
Previously if a client sent a commit message without attaching a new buffer then it would end up detaching the existing buffer because surface->pending.buffer would be NULL. This patch makes it explicitly track when an attach is sent for a commit and so that it can avoid making any changes otherwise. This fixes cases where GTK apps would send a damage event without a new buffer. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit aa412b9c709120bd8d88a014010c448f3b9fcfb7)
