Fix error printing if no command string is set.
Fix error printing if no command string is set.

Change-Id: I588c0d0a4e1b8f80c967ebfb6aff179a0cac4a36

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base