Fix for LP#614265 Crash in _ma_unpin_all_pages / _ma_search on DELETE with Aria search engine

Fixed compiler warnings

client/mysqlslap.c:
  Fixed compiler warnings
mysql-test/suite/maria/r/maria.result:
  Test case for LP#614265
mysql-test/suite/maria/t/maria.test:
  Test case for LP#614265
mysql-test/suite/pbxt/t/skip_name_resolve-master.opt:
  Ensure that we get restart before test (as test uses show processlist)
sql/handler.cc:
  Added cloned marker if clone was called (for safety checks & debugging)
sql/handler.h:
  Added cloned marker if clone was called (for safety checks & debugging)
storage/maria/ha_maria.cc:
  In clone call, set file->trn if cloned file had this set. This is needed as maria_create_trn_for_mysql() and thus file->trn is never set for cloned table.
  Ensure that file->trn is properly reset after calls to repair/check/zerofill.
  Increment locked table count if file->trn is set (as we decrement this in the unlock call)
tests/mysql_client_test.c:
  Fixed compiler warnings

1 files changed, 11 insertions, 6 deletions

diff --git a/sql/handler.cc b/sql/handler.cc
index afd9d08971d..7b1100ffe9d 100644
--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -2027,6 +2027,10 @@ int ha_delete_table(THD *thd, handlerton *table_type, const char *path,
 handler *handler::clone(MEM_ROOT *mem_root)
 {
   handler *new_handler= get_new_handler(table->s, mem_root, table->s->db_type());
+
+  if (!new_handler)
+    return NULL;
+
   /*
     Allocate handler->ref here because otherwise ha_open will allocate it
     on this->table->mem_root and we will not be able to reclaim that memory 
@@ -2034,12 +2038,13 @@ handler *handler::clone(MEM_ROOT *mem_root)
   */
   if (!(new_handler->ref= (uchar*) alloc_root(mem_root, ALIGN_SIZE(ref_length)*2)))
     return NULL;
-  if (new_handler && !new_handler->ha_open(table,
-                                           table->s->normalized_path.str,
-                                           table->db_stat,
-                                           HA_OPEN_IGNORE_IF_LOCKED))
-    return new_handler;
-  return NULL;
+  if (new_handler->ha_open(table,
+                           table->s->normalized_path.str,
+                           table->db_stat,
+                           HA_OPEN_IGNORE_IF_LOCKED))
+    return NULL;
+  new_handler->cloned= 1;                      // Marker for debugging
+  return new_handler;
 }