Fix for pushbuild failure (test which can't run in embedded mode) and compiler warning

mysql-test/suite/maria/t/maria_showlog_error.test:
  test which can't run in embedded mode
storage/innobase/handler/ha_innodb.cc:
  compiler warning

mysql-test/suite/maria/t/maria_showlog_error.test

 -- source include/have_maria.inc
+# can't restart server in embedded
+--source include/not_embedded.inc
 # remove_file can't remove opened file under windows. So we can't reproduce
 # the problem there
 --source include/not_windows.inc

storage/innobase/handler/ha_innodb.cc

@@ -1405,7 +1405,9 @@ innobase_init(
 	int		err;
 	bool		ret;
 	char		*default_path;
+#ifdef SAFE_MUTEX
 	my_bool         old_safe_mutex_deadlock_detector;
+#endif
 
 	DBUG_ENTER("innobase_init");
         handlerton *innobase_hton= (handlerton *)p;