Correcting NULL pointer when callerApp is not set

Change-Id: Ia6570f428141de32d564dd190bbcf93a5d640fd1
JIRA: CYAN-2458
Issue: https://jira.cyanogenmod.org/browse/CYAN-2458
Merge "Correcting NULL pointer when callerApp is not set" into cm-10.2
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2