Cellular: Fix PLMN debug trace for IAR

Kimmo Vaisanen · Kimmo Vaisanen · commit b26314a7991a · 2019-06-13T15:35:37.000+03:00
IAR does not allow printing from null pointer as parameter for %s. PLMN string
can be null depending on user configuration.
diff --git a/features/cellular/framework/device/CellularStateMachine.cpp b/features/cellular/framework/device/CellularStateMachine.cpp
@@ -167,7 +167,7 @@ bool CellularStateMachine::open_sim()
 
     if (sim_ready) {
         _cb_data.error = _network.set_registration(_plmn);
-        tr_debug("STM: set_registration: %d, plmn: %s", _cb_data.error, _plmn);
+        tr_debug("STM: set_registration: %d, plmn: %s", _cb_data.error, _plmn ? _plmn : "NULL");
         if (_cb_data.error) {
             return false;
         }

Original file line number	Diff line number	Diff line change
`@@ -167,7 +167,7 @@ bool CellularStateMachine::open_sim()`
`167`	`167`
`168`	`168`	`if (sim_ready) {`
`169`	`169`	`_cb_data.error = _network.set_registration(_plmn);`
`170`		`- tr_debug("STM: set_registration: %d, plmn: %s", _cb_data.error, _plmn);`
	`170`	`+ tr_debug("STM: set_registration: %d, plmn: %s", _cb_data.error, _plmn ? _plmn : "NULL");`
`171`	`171`	`if (_cb_data.error) {`
`172`	`172`	`return false;`
`173`	`173`	`}`