Build failure - librump/rumpvfs/rumpblk.c

[Paul Goyette <paul%whooppee.com@localhost>]

cc1: warnings being treated as errors
/build/netbsd-local/src/lib/librumpvfs/../../sys/rump/librump/rumpvfs/rumpblk.c:
 In function 'dostrategy':
/build/netbsd-local/src/lib/librumpvfs/../../sys/rump/librump/rumpvfs/rumpblk.c:
495: warning: 'async' is used uninitialized in this function

Failing on both amd64 and i386


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