Fix warnings when compiling with FUZZING enabled

celt/rate.c

@@ -356,6 +356,8 @@ static OPUS_INLINE int interp_bits2pulses(const CELTMode *m, int start, int end,
             else
                depth_threshold = 0;
 #ifdef FUZZING
+            (void)signalBandwidth;
+            (void)depth_threshold;
             if ((rand()&0x1) == 0)
 #else
             if (codedBands<=start+2 || (band_bits > (depth_threshold*band_width<<LM<<BITRES)>>4 && j<=signalBandwidth))

src/opus_encoder.c

@@ -1315,6 +1315,8 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
         st->stream_channels = st->force_channels;
     } else {
 #ifdef FUZZING
+        (void)stereo_music_threshold;
+        (void)stereo_voice_threshold;
        /* Random mono/stereo decision */
        if (st->channels == 2 && (rand()&0x1F)==0)
           st->stream_channels = 3-st->stream_channels;
@@ -1353,6 +1355,8 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_
     } else if (st->user_forced_mode == OPUS_AUTO)
     {
 #ifdef FUZZING
+        (void)stereo_width;
+        (void)mode_thresholds;
        /* Random mode switching */
        if ((rand()&0xF)==0)
        {