avformat/electronicarts: fix EOF check

Similar to feof(), avio_feof() is only true after an actual overread.

Signed-off-by: Marton Balint <cus@passwd.hu>

libavformat/electronicarts.c

@@ -582,9 +582,9 @@ static int ea_read_packet(AVFormatContext *s, AVPacket *pkt)
     int av_uninit(num_samples);
 
     while ((!packet_read && !hit_end) || partial_packet) {
+        chunk_type = avio_rl32(pb);
         if (avio_feof(pb))
             return AVERROR_EOF;
-        chunk_type = avio_rl32(pb);
         chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
         if (chunk_size < 8)
             return AVERROR_INVALIDDATA;