Fix exceptions

framer/Extras/TouchEmulator.coffee

@@ -122,8 +122,9 @@ class TouchEmulator extends BaseClass
		
		if event.keyCode is @keyPanCode
			cancelEvent(event)
			@centerPoint = Utils.pointCenter(@touchPoint, @point)
			@isPanKeyDown = false
			if @touchPoint and @point
				@centerPoint = Utils.pointCenter(@touchPoint, @point)
				@isPanKeyDown = false
			

	mousedown: (event) =>
@@ -151,26 +152,30 @@ class TouchEmulator extends BaseClass
	mousemove: (event) =>
		
		cancelEvent(event)
		
		@startPoint ?=

		@point =
			x: event.pageX
			y: event.pageY
		
		@centerPoint ?= @startPoint

		@startPoint ?= @point 
		@centerPoint ?= @point
		
		if @isPinchKeyDown and not @isPanKeyDown
			@touchPoint = Utils.pointAdd(@touchPointerInitialOffset, @pinchPoint(@point, @centerPoint))
			@touchPointDelta = Utils.pointSubtract(@point, @touchPoint)
			if @touchPointerInitialOffset and @centerPoint
				@touchPoint = Utils.pointAdd(@touchPointerInitialOffset, @pinchPoint(@point, @centerPoint))
				@touchPointDelta = Utils.pointSubtract(@point, @touchPoint)
			
		if @isPinchKeyDown and @isPanKeyDown
			@touchPoint = @panPoint(@point, @touchPointDelta)
			if @touchPoint and @touchPointDelta
				@touchPoint = @panPoint(@point, @touchPointDelta)

		if @isPinchKeyDown or @isPanKeyDown
			@touchPointLayer.visible = true
			@touchPointLayer.midX = @touchPoint.x
			@touchPointLayer.midY = @touchPoint.y
			if @touchPoint
				@touchPointLayer.visible = true
				@touchPointLayer.midX = @touchPoint.x
				@touchPointLayer.midY = @touchPoint.y
	
		if @isPinchKeyDown or @isPanKeyDown
		if (@isPinchKeyDown or @isPanKeyDown) and @touchPointDelta
			dispatchTouchEvent("touchmove", @target, event, @touchPointDelta)
		else
			dispatchTouchEvent("touchmove", @target, event)