[signal] Differentiate paging success from expiration in SS_PAGING

This is useful information to know and actually fixes a segfault
in rllp.c where lchan is accessed even tough it could be NULL in
case of failure.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
4 files changed
tree: 82ef2b092b47ae2d5db6b198fd34ff881a9d9e63
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. rrlp-ephemeris/
  5. wireshark/