1) BUG#27276 - InnoDB Error: ibuf cursor restoration fails

2) Follow up fix for BUG#27276 which fixes the bug introduced in
   the previous revision r2924

Detailed revision comments:

r2924 | marko | 2008-10-29 10:07:48 +0200 (Wed, 29 Oct 2008) | 7 lines
branches/5.1: Merge revision 2866 from branches/zip:

ibuf_delete_rec(): When the cursor to the insert buffer record cannot be
restored, do not complain if the tablespace does not exist. (Bug #27276)

Approved by Sunny Bains (rb://34)

r3598 | marko | 2008-12-22 15:28:03 +0200 (Mon, 22 Dec 2008) | 6 lines
branches/5.1: ibuf_delete_rec(): When the record cannot be found and
the tablespace has been dropped, commit the mini-transaction, so that
InnoDB will not hold the insert buffer tree latch in exclusive mode,
causing a potential deadlock.  This bug was introduced in the fix of
Bug #27276 in r2924.