[MM] [PATCH] port-probe: fix crash in serial_probe_at_parse_response due to NULL response

[Ben Chan <benchan chromium org>]

When the serial port is not open, internal_queue_command
(mm-serial-port.c) invokes serial_probe_at_parse_response
(mm-port-probe.c) with a NULL response. This patch modifies
serial_probe_at_parse_response to handle that properly.
---
 src/mm-port-probe.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mm-port-probe.c b/src/mm-port-probe.c
index baadee0..c31affe 100644
--- a/src/mm-port-probe.c
+++ b/src/mm-port-probe.c
@@ -450,7 +450,7 @@ serial_probe_at_parse_response (MMAtSerialPort *port,
     }
 
     if (!task->at_commands->response_processor (task->at_commands->command,
-                                                response->str,
+                                                (response) ? response->str : "",
                                                 !!task->at_commands[1].command,
                                                 error,
                                                 &result,
-- 
1.7.7.3