Fix for bug #25595 "missing DBUG_RETURN in function "mysql_stat""

libmysql/libmysql.c:
  Fix for bug #25595 "missing DBUG_RETURN in function "mysql_stat""
  
  Use DBUG_RETURN instead of return

libmysql/libmysql.c

@@ -1367,7 +1367,7 @@ mysql_stat(MYSQL *mysql)
 {
   DBUG_ENTER("mysql_stat");
   if (simple_command(mysql,COM_STATISTICS,0,0,0))
-    return mysql->net.last_error;
+    DBUG_RETURN(mysql->net.last_error);
   DBUG_RETURN((*mysql->methods->read_statistics)(mysql));
 }