Changed assert to warning
Changed assert to warning

Change-Id: I0c23736e4463cda4e4231942c39667b664bd8418

Samsung/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction