Fixed message queue retaining old messages

Fixes #263.

Author: rm-code

src/CombatState.lua

@@ -95,6 +95,9 @@ function CombatState:initialize( playerFaction, savegame )
     self.map:observe( self )
     self.map:observe( self.factions )
 
+    -- Clear the message queue.
+    MessageQueue.clear()
+
     -- Free memory if possible.
     collectgarbage( 'collect' )
 end

src/util/MessageQueue.lua

@@ -34,6 +34,13 @@ function MessageQueue.dequeue()
     return table.remove( messages, 1 )
 end
 
+---
+-- Clears the message queue of any old messages.
+--
+function MessageQueue.clear()
+    messages = {}
+end
+
 ---
 -- Checks wether the message queue is empty.
 -- @treturn boolean True if the queue is empty.