Remove obsolete check of conn and lchan pointers not beeing NULL

The check is removed from gsm48_cc_rx_setup() and gsm48_cc_rx_call_conf().
Receiving a layer 3 message implies that the transaction has a subscriber
connection and a logical channel.

This patch fixes the Coverity issues with CID 115311 and CID 1155312.
1 file changed
tree: e72bd7c49f21b78b8296e8709e5cef8897246fef
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README