Change default facing direction to south to match liblcf

Fixes an issue where a north-facing client would show up as south-
facing to other players after they reconnected.

Client PR: ynoproject/ynoengine#67

Author: tsdko

server/client.go

@@ -33,6 +33,8 @@ const (
 	maxMessageSize = 4096
 
 	maxPictures = 1000
+
+	defaultFacing = 2 // down
 )
 
 type Picture struct {
@@ -303,7 +305,7 @@ func (c *RoomClient) disconnect() {
 func (c *RoomClient) reset() {
 	c.x = -1
 	c.y = -1
-	c.facing = 0
+	c.facing = defaultFacing
 	c.speed = 0
 
 	c.flash = [5]int{}

server/room.go

@@ -341,7 +341,7 @@ func (c *RoomClient) getPlayerData(client *RoomClient) {
 	if client.x != -1 {
 		c.outbox <- buildMsg("m", client.session.id, client.x, client.y)
 	}
-	if client.facing != 0 {
+	if client.facing != defaultFacing {
 		c.outbox <- buildMsg("f", client.session.id, client.facing)
 	}
 	if client.speed != 0 {