h264pred: Add a few missing const declarations for ff_cropTbl derived pointers

The pointers that get assigned ff_cropTbl were made const in
9e0f14f1, but other variables that transitively are assigned
based on these variables were missed.

Signed-off-by: Martin Storsjö <martin@martin.st>
lavf: Use RTP_MAX_PACKET_LENGTH instead of 1500

Signed-off-by: Martin Storsjö <martin@martin.st>
rtpdec: Increase max rtp packet size to 8192

This fixes connecting to "Ceton InfiniTV4 PCIe & USB".

Signed-off-by: Martin Storsjö <martin@martin.st>
srtp: Include rtpdec.h for RTP_MAX_PACKET_LENGTH

This was missed from 350ad50b - this fixes building the fate-srtp
test.

Signed-off-by: Martin Storsjö <martin@martin.st>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  srtp: Include rtpdec.h for RTP_MAX_PACKET_LENGTH
  rtpdec: Increase max rtp packet size to 8192
  lavf: Use RTP_MAX_PACKET_LENGTH instead of 1500
  h264pred: Add a few missing const declarations for ff_cropTbl derived pointers

Merged-by: Michael Niedermayer <michaelni@gmx.at>
msmpeg4: fix asm code in ff_msmpeg4_pred_dc()

Fixes first half of Ticket2414

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
msmpeg4: ignore negative DC overflow

Fixes second half of Ticket2414

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>