xplist: Prevent assert when parsing CF$UID dict with invalid value node
xplist: Prevent assert when parsing CF$UID dict with invalid value node

Credit to OSS-Fuzz

libimobiledevice/libplist,Tatsh/libplist,libimobiledevice/libplist,Tatsh/libplist,libimobiledevice-win32/libplist,libimobiledevice-win32/libplist,libimobiledevice-win32/libplist,Tatsh/libplist,libimobiledevice/libplist,libimobiledevice-win32/libplist,Tatsh/libplist