[gnome-remote-desktop/cherry-pick-3c692112] rdp/nw-auto: Fix crash when updating unchanged ping source

[Jonas Ådahl <jadahl src gnome org>]

commit d330d0c55afab72311e33528dbb23f5e66b107cf
Author: Pascal Nowack <Pascal Nowack gmx de>
Date:   Tue Sep 13 07:18:13 2022 +0200

    rdp/nw-auto: Fix crash when updating unchanged ping source
    
    Commit 51e94ba8dfaa3d6daf31cb982e40e4e0439acb71 fixed an issue, where
    the ping source was attempted to be created, when it already existed,
    as gnome-remote-desktop previously assumed, that every update of the
    RTT consumers and RTT consumer necessities will always change the ping
    source.
    Commit 351893fac77dea21a44fc44508ba2eefe1d1af4a accidentally broke that
    behaviour by always assuming again, that updating the ping source will
    always change the ping source itself.
    However, this time, the situation is different. Since the former commit
    added an assertion to not create a ping source again, when it already
    exists, gnome-remote-desktop crashes, due to invalid behaviour (which
    also made this issue discoverable).
    
    Fix this situation again by checking again, whether an update of the
    ping source is needed.
    Due to the latter commit, the initial ping source should be created, as
    that commit introduced another state for the ping interval recognizing
    it to be non-existent.
    
    Fixes: https://errors.ubuntu.com/problem/4d8b5efdf8ade96d4019c6b7cb92649f660e9fe9
    
    
    (cherry picked from commit 3c692112507561467e04beac7181cd6fd459756a)

 src/grd-rdp-network-autodetection.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/grd-rdp-network-autodetection.c b/src/grd-rdp-network-autodetection.c
index 984ec408..b64c52e9 100644
--- a/src/grd-rdp-network-autodetection.c
+++ b/src/grd-rdp-network-autodetection.c
@@ -183,8 +183,10 @@ update_ping_source (GrdRdpNetworkAutodetection *network_autodetection)
   else
     new_ping_interval_type = PING_INTERVAL_LOW;
 
-  if (network_autodetection->ping_interval != new_ping_interval_type &&
-      network_autodetection->ping_source)
+  if (network_autodetection->ping_interval == new_ping_interval_type)
+    return;
+
+  if (network_autodetection->ping_source)
     {
       g_source_destroy (network_autodetection->ping_source);
       g_clear_pointer (&network_autodetection->ping_source, g_source_unref);