15e208c4cc
Avoid freeing buffers holding new back content (with GLX_SWAP_COPY_OML and GLX_SWAP_EXCHANGE_OML) Prevously that would have resulted in back buffer content becoming incorrect after a swap, although I haven't managed to trigger such a situation yet. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com>