Fix -Wmultichar warnings in HEVCUtilities.cpp. I'm doing this in a separate patch just in case it unexpectedly breaks something.
Created attachment 449434 [details] Patch
Iām going to do some other FourCC cleanup.
Committed r288167 (246156@main): <https://commits.webkit.org/246156@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 449434 [details].
<rdar://problem/87744140>