ico: Parses compressed data as BMP if compressed entry is last

Submitted by Dominique Leuenberger

Description

I have an .ico file which gimp opens just fine, but eog fails to load it.

NOTE: I don't think the fault is at EOG, but I use it as an entry point to find a more suitable compoent.

The same 'noisy output' is seen in nautilus by means of the preview created (so hopefully this is something shared between eog and whatever creates the thumbnail for nautilus).

I attach an Icon for reference

Version: git master

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