fixed potentially broken error reporting on pid configure failure
fixed potentially broken error reporting on pid configure failure

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