LAPD: Remove all calls to 'assert' from the code
LAPD: Remove all calls to 'assert' from the code

For a system-level daemon, no protocol parser error should ever call
assert, which would take down the entire process.

osmocom/libosmo-abis,telenoobie/libosmo-abis,telenoobie/libosmo-abis,osmobuntu/libosmo-abis,osmocom/libosmo-abis,osmobuntu/libosmo-abis,osmobuntu/libosmo-abis,osmobuntu/libosmo-abis,osmocom/libosmo-abis