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, 2 insertions, 4 deletions

diff --git a/sql/rpl_injector.cc b/sql/rpl_injector.cc
index 719528a7728..07d9452abe9 100644
--- a/sql/rpl_injector.cc
+++ b/sql/rpl_injector.cc
@@ -230,8 +230,7 @@ int injector::record_incident(THD *thd, Incident incident)
   Incident_log_event ev(thd, incident);
   if (int error= mysql_bin_log.write(&ev))
     return error;
-  mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
-  return 0;
+  return mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
 }
 
 int injector::record_incident(THD *thd, Incident incident, LEX_STRING const message)
@@ -239,6 +238,5 @@ int injector::record_incident(THD *thd, Incident incident, LEX_STRING const mess
   Incident_log_event ev(thd, incident, message);
   if (int error= mysql_bin_log.write(&ev))
     return error;
-  mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
-  return 0;
+  return mysql_bin_log.rotate_and_purge(RP_FORCE_ROTATE);
 }