Remove 'if self.ptr' checks from VideoCodecContext
Remove 'if self.ptr' checks from VideoCodecContext

We are guaranteed to be handed an AVCodecContext* in the constuctor.

AudioCodecContext doesn't have these kind of checks. This is most likely
a left-over from the refactoring that specialized CodecContext classes.

PyAV-Org/PyAV,mikeboers/PyAV,PyAV-Org/PyAV,mikeboers/PyAV