block: shortcut writebuffer_flush if writing is disabled
Saves a few bytes of binary space.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 8c41c54 commit c7848ffee2646d55efe05c2df5b2d04b47dd9384
@Sascha Hauer Sascha Hauer authored on 19 Jul 2013
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common/block.c