Bug#36600203: There is a memory leak defect on line 3960 of the mysql.cc file

Problem: There is a return statement after the momory is allocated and
before the memory is freed. The return may be reached before the memory
is needed.

Fix: Move the memory allocation after the return statement.

This is a backport from mysql-trunk

Change-Id: I14648efaebf38b5b81c08290e169ad44c72ac17a

Author: Michal Jankowski

client/mysql.cc

@@ -3592,13 +3592,13 @@ static void print_table_data(MYSQL_RES *result) {
   bool *num_flag;
   size_t sz;
 
-  sz = sizeof(bool) * mysql_num_fields(result);
-  num_flag = (bool *)my_safe_alloca(sz, MAX_ALLOCA_SIZE);
   if (column_types_flag) {
     print_field_types(result);
     if (!mysql_num_rows(result)) return;
     mysql_field_seek(result, 0);
   }
+  sz = sizeof(bool) * mysql_num_fields(result);
+  num_flag = (bool *)my_safe_alloca(sz, MAX_ALLOCA_SIZE);
   separator.copy("+", 1, charset_info);
   while ((field = mysql_fetch_field(result))) {
     size_t length = column_names ? field->name_length : 0;