tree c71789c94d982b0fc27aafdc2cddc31e17c740a9
parent 9da77abb6b7a023f2dcc1564835e89d9436d6793
author Philipp Maier <pmaier@sysmocom.de> 1526371582 +0200
committer Philipp Maier <pmaier@sysmocom.de> 1526371582 +0200

fsm: guard action callback

The FSM allows to set individual action callback functions for each
state but it does not allow to leave the action callback pointer
unpopulated. However, there are cornercases where having no callback
function is desirable.

- Check if action callback is popolated before executing it.

Change-Id: I36d221c973d3890721ef1d376fb9be82c4311378