Merge bk@192.168.21.1:mysql-5.1-opt

into  mysql.com:/home/hf/work/26527/my51-26527


sql/ha_partition.cc:
  Auto merged

sql/ha_partition.cc

@@ -2914,12 +2914,7 @@ void ha_partition::start_bulk_insert(ha_rows rows)
   handler **file;
   DBUG_ENTER("ha_partition::start_bulk_insert");
 
-  if (!rows)
-  {
-    /* Avoid allocation big caches in all underlaying handlers */
-    DBUG_VOID_RETURN;
-  }
-  rows= rows/m_tot_parts + 1;
+  rows= rows ? rows/m_tot_parts + 1 : 0;
   file= m_file;
   do
   {