CommonInstaller: minor change

CommonInstaller

@@ -1505,6 +1505,8 @@ VENDORBLOCK=${VENDORBLOCK}
 
 df 2>/dev/null | sed '/^\//d' >> ${nanodroid_logfile}
 
+if [ ! -z "${cfg_setup}" ]; then
+
 echo "
 ### SETUP ###
 
@@ -1513,6 +1515,8 @@ configuration: ${cfg_setup}
 
 cat "${cfg_setup}" >> ${nanodroid_logfile}
 
+fi
+
 if [ ! -z "${cfg_apps}" ]; then
 
 echo "