Merge with MySQL 5.1.55

- Fixed some issues with partitions and connection_string, which also fixed lp:716890 "Pre- and post-recovery crash in Aria"
- Fixed wrong assert in Aria

Now need to merge with latest xtradb before pushing 

sql/ha_partition.cc:
  Ensure that m_ordered_rec_buffer is not freed before close.
sql/mysqld.cc:
  Changed to use opt_stack_trace instead of opt_pstack.
  Removed references to pstack
sql/partition_element.h:
  Ensure that connect_string is initialized
storage/maria/ma_key_recover.c:
  Fixed wrong assert

1 files changed, 1 insertions, 0 deletions

diff --git a/mysys/my_seek.c b/mysys/my_seek.c
index 4ca5393e640..d186d56869a 100644
--- a/mysys/my_seek.c
+++ b/mysys/my_seek.c
@@ -101,6 +101,7 @@ my_off_t my_tell(File fd, myf MyFlags)
     my_errno= errno;
     if (MyFlags & MY_WME)
       my_error(EE_CANT_SEEK, MYF(0), my_filename(fd), my_errno);
+    DBUG_PRINT("error", ("tell: %lu  errno: %d", (ulong) pos, my_errno));
   }
   DBUG_PRINT("exit",("pos: %lu", (ulong) pos));
   DBUG_RETURN((my_off_t) pos);