This reverts commit f0a7fe36.

That way we're guaranteed that it is safe to delete it after.

don't call methods on deleted objects!

Also the memory pool for the SDP must be deallocated after we've destroyed
the SDP.

Resolved Conflicts:
	sflphone-common/src/audio/algorithm.h
	sflphone-common/src/audio/audiortp/AudioRtpRecordHandler.cpp

This lead to a dead-lock in its destructor. Instead, AudioRtpFactory
must delete it.

also fix wrong assertion about the final number of samples

The GUI lets user choose .ul (ULAW) or .au files (GSM)
However RawFile class assumes ULAW only so we reject GSM files

Also resample the whole sample buffer given

check is already done in RingBuffer::Put

check is already done in putData()

Resolved Conflicts:
	sflphone-common/src/audio/audiortp/AudioRtpRecordHandler.cpp

bcopy is deprecated
memcpy is also more performant since it doesn't have to handle overlap

move volume change to only user: alsalayer