avcodec/wmavoice: Check sample_rate

Fixes: left shift of 538976288 by 8 places cannot be represented in type 'int'
Fixes: 18376/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAVOICE_fuzzer-5741645391200256

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

libavcodec/wmavoice.c

@@ -433,6 +433,9 @@ static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
         return AVERROR_INVALIDDATA;
     }
 
+    if (ctx->sample_rate >= INT_MAX / (256 * 37))
+        return AVERROR_INVALIDDATA;
+
     s->min_pitch_val    = ((ctx->sample_rate << 8)      /  400 + 50) >> 8;
     s->max_pitch_val    = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8;
     pitch_range         = s->max_pitch_val - s->min_pitch_val;