Added graceful stop support for Project Zomboid

lgsm/functions/command_stop.sh

@@ -191,7 +191,7 @@ fn_stop_graceful_select(){
 		fn_stop_graceful_goldsource
 	elif [ "${gamename}" == "Factorio" ]||[ "${engine}" == "unity3d" ]||[ "${engine}" == "unreal4" ]||[ "${engine}" == "unreal3" ]||[ "${engine}" == "unreal2" ]||[ "${engine}" == "unreal" ]||[ "${gamename}" == "Mumble" ]; then
 		fn_stop_graceful_ctrlc
-	elif  [ "${engine}" == "source" ]||[ "${engine}" == "quake" ]||[ "${engine}" == "idtech2" ]||[ "${engine}" == "idtech3" ]||[ "${engine}" == "idtech3_ql" ]||[ "${engine}" == "Just Cause 2" ]; then
+	elif  [ "${engine}" == "source" ]||[ "${engine}" == "quake" ]||[ "${engine}" == "idtech2" ]||[ "${engine}" == "idtech3" ]||[ "${engine}" == "idtech3_ql" ]||[ "${engine}" == "Just Cause 2" ]||[ "${engine}" == "projectzomboid" ]; then
 		fn_stop_graceful_cmd "quit" 30
 	else
 		fn_stop_tmux