avcodec/prosumer: Check for bytestream eof in decompress()

Fixes: Infinite loop
Fixes: 10685/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5652236881887232

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9acdf17b2c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/prosumer.c

@@ -57,7 +57,7 @@ static int decompress(GetByteContext *gb, int size, PutByteContext *pb, const ui
     b = lut[2 * idx];
 
     while (1) {
-        if (bytestream2_get_bytes_left_p(pb) <= 0)
+        if (bytestream2_get_bytes_left_p(pb) <= 0 || bytestream2_get_eof(pb))
             return 0;
         if (((b & 0xFF00u) != 0x8000u) || (b & 0xFFu)) {
             if ((b & 0xFF00u) != 0x8000u) {