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H A Dblk-merge.cdiff 5014c311baa2b21384321fa4a9f617a92e3e56f0 Wed Sep 02 17:46:02 CDT 2015 Jens Axboe <axboe@fb.com> block: fix bogus compiler warnings in blk-merge.c

The compiler can't figure out that bvprv is initialized whenever 'prev'
is set to 1 as well. Use a pointer to bvprv instead, setting it to NULL
initially, and get rid of the 'prev' tracking. This dumbs it down
enough that gcc is happy.

Signed-off-by: Jens Axboe <axboe@fb.com>