check message size on the server

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[Geogit] // sent from France, Saint-Cloud [48.8333,2.1833] :FR:

server/methods/sendMessage.coffee

@@ -1,5 +1,7 @@
 Meteor.methods
 	sendMessage: (message) ->
+		if message.msg?.length > RocketChat.settings.get('Message_MaxAllowedSize')
+			throw new Meteor.Error 400, '[methods] sendMessage -> Message size exceed Message_MaxAllowedSize'
 
 		if not Meteor.userId()
 			throw new Meteor.Error('invalid-user', "[methods] sendMessage -> Invalid user")