rewrite, clarifications (#49)

code/controllers/subsystem/ticker.dm

@@ -159,7 +159,7 @@ var/datum/subsystem/ticker/ticker
 		if(!can_continue)
 			qdel(mode)
 			mode = null
-			world << "<B>Error setting up [master_mode].</B> Reverting to pre-game lobby."
+			world << "<B>Error setting up [master_mode]. It's likely that there are no available antagonists for the selected mode.</B> Reverting to pre-game lobby."
 			SSjob.ResetOccupations()
 			return 0
 	else

code/controllers/subsystem/voting.dm

@@ -122,12 +122,12 @@ var/datum/subsystem/vote/SSvote
 					else
 						master_mode = .
 			if("roundtype")
-				if (ticker && ticker.mode)
-					return message_admins("A vote has tried to change the gamemode, but the game has already started. Aborting.")
-				master_mode = .
-				log_admin("Mode has been voted for and switched to: [master_mode].")
-				world << "<span class='adminnotice'><b>The mode is now: [master_mode]</b></span>"
-				world.save_mode(master_mode)
+				if(ticker && ticker.mode)
+					message_admins("A vote has tried to change the gamemode, but the game has already started. Aborting.")
+				else if(master_mode != .)
+					world.save_mode(.)
+					master_mode = .
+					world << "<span class='adminnotice'><b>The mode is now: [master_mode]</b></span>"
 	if(restart)
 		var/active_admins = 0
 		for(var/client/C in admins)