don't show results for 1-player "games"

game.lua

@@ -47,7 +47,11 @@ yl_snowball.update_hud = function(player)
     local game = games_by_player[player_name]
     local text = ""
     if game then
-        text = game:get_info_string(true)
+        if game.player_num > 1 then
+            text = game:get_info_string(true)
+        else
+            text = ""
+        end
     else
         game_hud:set_enabled(player, false)
     end
@@ -107,6 +111,7 @@ function Game:new()
     self.time_started = current_time
     self.time_last_action = current_time
     self.players = {}
+    self.player_num = 0
     active_games[self] = true
     return self
 end
@@ -149,6 +154,7 @@ function Game:add_player(player_name, game_player)
     end
     self.players[player_name] = game_player
     games_by_player[player_name] = self
+    self.player_num = self.player_num + 1
 end
 
 
@@ -202,9 +208,11 @@ function Game:stop()
         self:get_info_string(),
     }
 
-    for p_name, player in pairs(self.players) do
-        if get_player_participation(p_name) then
-            core.chat_send_player(p_name, table.concat(lines, "\n"))
+    if self.player_num > 1 then
+        for p_name, player in pairs(self.players) do
+            if get_player_participation(p_name) then
+                core.chat_send_player(p_name, table.concat(lines, "\n"))
+            end
         end
     end