Bug fix #35143

Animplayer treated .tif extensions as movie files, so that didn't work.
Added another hardcoded check for it, like for png tga exr jpg etc.

Why FFmpeg thinks .tif is a movie... that's for another day :)
Quicktime QTKit did same btw.



git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56412 954f8c5b-7b00-dc11-b283-0030488c597c