Fix LEX_CSTRING passed as argument of printf-like functions

sql/set_var.cc

@@ -808,7 +808,7 @@ int set_var::light_check(THD *thd)
   if (var->check_type(type))
   {
     int err= type == OPT_GLOBAL ? ER_LOCAL_VARIABLE : ER_GLOBAL_VARIABLE;
-    my_error(err, MYF(0), var->name);
+    my_error(err, MYF(0), var->name.str);
     return -1;
   }
   if (type == OPT_GLOBAL && check_global_access(thd, SUPER_ACL))

sql/sql_handler.cc

@@ -683,7 +683,7 @@ mysql_ha_fix_cond_and_key(SQL_HANDLER *handler,
                 HA_ONLY_WHOLE_INDEX))
       {
         my_error(ER_KEY_DOESNT_SUPPORT, MYF(0),
-                 table->file->index_type(handler->keyno), keyinfo->name);
+                 table->file->index_type(handler->keyno), keyinfo->name.str);
         return 1;
       }
 

storage/innobase/handler/handler0alter.cc

@@ -6474,7 +6474,7 @@ ha_innobase::prepare_inplace_alter_table(
 					Sql_condition::WARN_LEVEL_WARN,
 					HA_ERR_WRONG_INDEX,
 					"InnoDB could not find key"
-					" with name %s", key->name);
+					" with name %s", key->name.str);
 			} else {
 				ut_ad(!index->to_be_dropped);
 				if (!index->is_primary()) {