[PULL 2/4] qga: fix assert regression on guest-shutdown

[Michael Roth <mdroth@linux.vnet.ibm.com>]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Since commit 781f2b3d1e ("qga: process_event() simplification"),
send_response() is called unconditionally, but will assert when "rsp" is
NULL. This may happen with QCO_NO_SUCCESS_RESP commands, such as
"guest-shutdown".

Fixes: 781f2b3d1e5ef389b44016a897fd55e7a780bf35
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Reported-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 qga/main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/qga/main.c b/qga/main.c
index f0e454f28d..3febf3b0fd 100644
--- a/qga/main.c
+++ b/qga/main.c
@@ -531,7 +531,11 @@ static int send_response(GAState *s, const QDict *rsp)
     QString *payload_qstr, *response_qstr;
     GIOStatus status;
 
-    g_assert(rsp && s->channel);
+    g_assert(s->channel);
+
+    if (!rsp) {
+        return 0;
+    }
 
     payload_qstr = qobject_to_json(QOBJECT(rsp));
     if (!payload_qstr) {
-- 
2.17.1