Fixed a memleak during shutdown, caused by missing mail db shutdown code.

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@11440 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/map.c

@@ -2998,6 +2998,13 @@ int map_sql_close(void)
 		logmysql_handle = NULL;
 	}
 
+	if(mail_server_enable)
+	{ 
+		ShowStatus("Close Mail DB Connection....\n");
+		Sql_Free(mail_handle);
+		mail_handle = NULL;
+	}
+
 	return 0;
 }