ReplicatedPG.cc: Fixes a bug in snap_trimmer where a pointer to a stack 	Cond is left in the mode.waiting_cond list.
ReplicatedPG.cc: Fixes a bug in snap_trimmer where a pointer to a stack
	Cond is left in the mode.waiting_cond list.

Signed-off-by: Samuel Just <080670f7d9c6f3eb64055fc3fc7c93ba2c444c40@hq.newdream.net>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph