XnViewMP 0.76.1 gif crash bug

[xnvw8465]

Tested on:
Windows 7 SP1 x64
XnViewMP 0.76.1 x64 and x86

Procedure:
1) Open XnViewMP
2) Navigate to a folder
3) Open an animated GIF (double click - Browser<>Fullscreen)
4) Press "Esc" to stop animation
5) Press "Esc" to close fullscreen window and return to browser
6) Open the same GIF
7) Crash

[xnview]

See Issue 786 for details.