Replace cliping in ff_acelp_interpolate() by a check&av_log, this should be the

quickest way to find out if it is needed.

Originally committed as revision 14970 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/acelp_filters.c

@@ -75,7 +75,9 @@ void ff_acelp_interpolate(
             i++;
             v += in[n - i] * filter_coeffs[idx - frac_pos];
         }
-        out[n] = av_clip_int16(v >> 15);
+        if(av_clip_int16(v>>15) != (v>>15))
+            av_log(NULL, AV_LOG_WARNING, "overflow that would need cliping in ff_acelp_interpolate()\n");
+        out[n] = v >> 15;
     }
 }