added missing quotes

functions/fn_check_steamuser

@@ -14,7 +14,7 @@ if [ "${steamuser}" == "username" ]; then
 fi
 if [ -z "${steamuser}" ]; then
 	fn_printwarnnl "Steam login not set. Using anonymous login."
-	if [ -d ${scriptlogdir} ]; then
+	if [ -d "${scriptlogdir}" ]; then
 		fn_scriptlog "Steam login not set. Using anonymous login."
 	fi
 	steamuser="anonymous"