Fix exception if there is no content layer set

framer/Components/ScrollComponent.coffee

@@ -93,6 +93,8 @@ class exports.ScrollComponent extends Layer

	calculateContentFrame: ->

		return Utils.rectZero() unless @content

		# Calculates the size of the content. By default this returns the total
		# size of all the content layers based on width and height. You can override
		# this for example to take scaling into account.
@@ -227,6 +229,8 @@ class exports.ScrollComponent extends Layer
		set: (contentInset) ->
			@_contentInset = Utils.rectZero(Utils.parseRect(contentInset))
			
			return unless @content
			
			# If we reset the content inset, we need to reset the content position
			contentFrame = @calculateContentFrame()
			contentFrame.x = contentFrame.x + @_contentInset.left