descriptors/dr_7c.c: clang compatibility
descriptors/dr_7c.c: clang compatibility

Use explicite parenthesis around ? : constructions.

UIKit0/libdvbpsi,vlc-mirror/libdvbpsi,mkrufky/libdvbpsi,avble/libdvbpsi,vlc-mirror/libdvbpsi,mkrufky/libdvbpsi,garbear/libdvbpsi,hiroshiyui/libdvbpsi,mkrufky/libdvbpsi,paraeco/libdvbpsi,paraeco/libdvbpsi,paraeco/libdvbpsi,krieger-od/libdvbpsi,krieger-od/libdvbpsi,UIKit0/libdvbpsi,avble/libdvbpsi,vlc-mirror/libdvbpsi,mwgoldsmith/dvbpsi,hiroshiyui/libdvbpsi,avble/libdvbpsi,garbear/libdvbpsi,mwgoldsmith/dvbpsi,krieger-od/libdvbpsi,hiroshiyui/libdvbpsi,paraeco/libdvbpsi,mwgoldsmith/dvbpsi,UIKit0/libdvbpsi,mwgoldsmith/dvbpsi,garbear/libdvbpsi