Remove unnecessary guarding &=0x0f around adpcm_ima_compress_sample().
patch by Timofei, tim ipi.ac ru
Date: Mon, 15 Oct 2007 19:55:29 +0400
Subject: [FFmpeg-devel] [PATCH] adpcm-ima-wav header and codec

Originally committed as revision 10773 to svn://svn.ffmpeg.org/ffmpeg/trunk
