QFileIconProvider for ANI and CUR files

QFileIconProvider returns the same icon for all ANI and CUR files - the icon of first encountered file of it's extension - though it shouldn't 'cause these files are icons themselves. I'm pretty sure, the reason for this is 'static bool isCacheable(const QFileInfo &fi)' function (qtbase/src/widgets/itemviews/qfileiconprovider.cpp, line 228).