Display corruption with GTK3 build

[Henrik Brautaset Aronsen]

I've sent a patch for this: [PATCH] Fix messed up display in GTK2

Henrik Brautaset Aronsen wrote:
> The subject should be s/GTK3 build/GTK3 updates/, because I'm not 
> building with GTK3.
>
> H
>
> Henrik Brautaset Aronsen wrote:
>> Commit 0323cb3741caa1e0a234815999b0516d2e75b0f1 ("Prepare to compile
>> with gtk-3") does bad things to Subsurface on MacOSX. The whole window
>> looks messed up.
>>
>> See the attached images for an example. (I'm using GTK2 2.24.14 btw)
>>
>> Henrik