Added checking of return value from my_once_alloc() in charset

Added checking of return value from malloc() in reg_init()


client/mysqltest.c:
  Added comment
dbug/dbug.c:
  Removed not needed test
mysys/charset.c:
  Added checking of return value from my_once_alloc()
regex/reginit.c:
  Abort if out of memory in reg_init() (unlikely)
sql/item_strfunc.cc:
  Added comment

1 files changed, 4 insertions, 0 deletions

diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index dd1ec6bd2da..40b18755744 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -2043,6 +2043,10 @@ String* Item_func_export_set::val_str(String* str)
     null_value=1;
     return 0;
   }
+  /*
+    Arg count can only be 3, 4 or 5 here. This is guaranteed from the
+    grammar for EXPORT_SET()
+  */
   switch(arg_count) {
   case 5:
     num_set_values = (uint) args[4]->val_int();