Canvas does not reflect the change of a layer order

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Open a new document
2.Create two layers A and B
3.Create another layer between A and B called C
4.The created layer is stacked on top of A and B
5.Drag layer C between A and B
6.The canvas doesn't update the new order
7.Pan the canvas or go to next frame and back
8. That will refresh the canvas

What is the expected output? What do you see instead?
I expect the canvas to show the new layer order, it stays the same until i 
either pan the canvas or go one frame back and forth

What version of the product are you using? On what operating system?
0.9.6 beta1
windows 7 x64

*Please provide any additional information below. If the program crashed on
Windows, you can attach the aseprite-memory.dmp file generated in the same
location where aseprite.exe is.*

Screenshots
After dragging the layer down
http://puu.sh/6pMY9.png

After panning the canvas
http://puu.sh/6pMZc.png

Original issue reported on code.google.com by cgmode...@hotmail.com on 19 Jan 2014 at 12:11

[GoogleCodeExporter]

Original comment by davidcapello on 3 Feb 2014 at 2:13

• Changed state: Accepted
• Added labels: Milestone-0.9, Priority-High
• Removed labels: Priority-Medium

[GoogleCodeExporter]

Fixed: 
https://github.com/aseprite/aseprite/commit/97d1acc036efa5af00ef6398ecadbbee60ac
09b6

Original comment by davidcapello on 3 Feb 2014 at 2:58

• Changed state: Fixed