avformat/oggparsespeex: Check frames_per_packet and packet_size
The speex specification does not seem to restrict these values, thus the limits where choosen so as to avoid multiplicative overflow Fixes undefined behavior Fixes: 635422.ogg Found-by:Matt Wolenetz <wolenetz@google.com> Signed-off-by:
Michael Niedermayer <michael@niedermayer.cc>
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