fixed bug rewriting senc when removing tracks from protected files
fixed bug rewriting senc when removing tracks from protected files

rbouqueau/gpac,gpac/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,rbouqueau/gpac,gpac/gpac,gpac/gpac,gpac/gpac,RodolpheFouquet/gpac,RodolpheFouquet/gpac,RodolpheFouquet/gpac,gpac/gpac,gpac/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,rbouqueau/gpac,gpac/gpac,gpac/gpac