avcodec/apac: Sanity check bits_per_coded_sample

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 53931/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APAC_fuzzer-6072913738727424

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/apac.c

@@ -75,7 +75,10 @@ static av_cold int apac_init(AVCodecContext *avctx)
         avctx->sample_fmt = AV_SAMPLE_FMT_U8P;
 
     if (avctx->ch_layout.nb_channels < 1 ||
-        avctx->ch_layout.nb_channels > 2)
+        avctx->ch_layout.nb_channels > 2 ||
+        avctx->bits_per_coded_sample < 8 ||
+        avctx->bits_per_coded_sample > 16
+    )
         return AVERROR_INVALIDDATA;
 
     for (int ch = 0; ch < avctx->ch_layout.nb_channels; ch++) {