From URL, this looks like security related fixes: Fix ADPCM heap corruption (FG-VD-16-067) Fix DVD/LPCM heap corruption (FG-VD-16-090)
https://trac.videolan.org/vlc/ticket/17448
I successfully built it by just renaming and commenting out ${PN}-2.2.4-qt57.patch. Unfortunately it didn't fix my weird VDPAU issue.
New upstream release 2.2.6 is now available with more security fixes.
Fixed in git. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=b2bcbfd9976f1f236c65affb1c954f43604284a3
Thanks for the report and the bump. We will proceed in bug 619494. *** This bug has been marked as a duplicate of bug 619494 ***