[gdm/benzea/fix-idle-cb-return] display-factory: Correctly return from idle callback

[Benjamin Berg <bberg src gnome org>]

commit 9fdd1fe31acdf711f32100831b3349e142a14b6d
Author: Benjamin Berg <bberg redhat com>
Date:   Thu Mar 25 17:16:20 2021 +0100

    display-factory: Correctly return from idle callback
    
    The idle callback was defined as a void function rather than returning a
    boolean as it should. This meant that the return value may end up being
    non-zero in some situations causing an infinite loop.
    
    This seems to only happen on aarch64 and possibly only with certain
    compiler versions.
    
    Closes: #668

 daemon/gdm-display-factory.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/daemon/gdm-display-factory.c b/daemon/gdm-display-factory.c
index 1214f7f54..b28d287cd 100644
--- a/daemon/gdm-display-factory.c
+++ b/daemon/gdm-display-factory.c
@@ -76,7 +76,7 @@ purge_display (char       *id,
         }
 }
 
-static void
+static gboolean
 purge_displays (GdmDisplayFactory *factory)
 {
         GdmDisplayFactoryPrivate *priv;
@@ -86,6 +86,8 @@ purge_displays (GdmDisplayFactory *factory)
         gdm_display_store_foreach_remove (priv->display_store,
                                           (GdmDisplayStoreFunc)purge_display,
                                           NULL);
+
+        return G_SOURCE_REMOVE;
 }
 
 void