ptgdp: Add sanity check for MPD

ptgdp

@@ -144,6 +144,12 @@ playlist() {
 			log "Music can be found at \"$_musicdir\""
 		fi
 	fi
+	if [ -z "$_optdownloadonly" ] && ! mpc status > /dev/null 2>&1; then
+		notify "Could not communicate with MPD" \
+			"MPD connection was refused. Ensure your configuration is correct and the daemon is currently running." \
+			normal dialog-error 3000
+		error "Failed to communicate with MPD" 52
+	fi
 	local -i dlexist=0
 	local -i dlsuccess=0
 	local -i dlfailure=0