avcodec/scpr: Check for min > max in decompress_p()

Fixes: Timeout
Fixes: 9342/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-4795990841229312

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

libavcodec/scpr.c

@@ -526,6 +526,9 @@ static int decompress_p(AVCodecContext *avctx,
         return ret;
 
     max += temp << 8;
+    if (min > max)
+        return AVERROR_INVALIDDATA;
+
     memset(s->blocks, 0, sizeof(*s->blocks) * s->nbcount);
 
     while (min <= max) {