Stop crashing on idle

Currently whenever GNOME becomes idle, it crashes. This adds some NULL
pointer guards to avoid crashing.

https://bugzilla.redhat.com/show_bug.cgi?id=2231680

mutter.spec

@@ -30,6 +30,9 @@ Patch1:        mutter-42.alpha-disable-tegra.patch
 # https://pagure.io/fedora-workstation/issue/79
 Patch2:        0001-place-Always-center-initial-setup-fedora-welcome.patch
 
+# https://gitlab.gnome.org/GNOME/mutter/-/issues/2985
+Patch3:        stop-crashing.patch
+
 BuildRequires: pkgconfig(gobject-introspection-1.0) >= 1.41.0
 BuildRequires: pkgconfig(sm)
 BuildRequires: pkgconfig(libwacom)

stop-crashing.patch

@@ -0,0 +1,34 @@
+diff --git a/src/backends/native/meta-output-kms.c b/src/backends/native/meta-output-kms.c
+index 0e7d0a9eb..d50deb421 100644
+--- a/src/backends/native/meta-output-kms.c
++++ b/src/backends/native/meta-output-kms.c
+@@ -134,6 +134,9 @@ meta_output_kms_get_privacy_screen_state (MetaOutput *output)
+   connector_state =
+     meta_kms_connector_get_current_state (output_kms->kms_connector);
+ 
++  if (!connector_state)
++    return FALSE;
++
+   return connector_state->privacy_screen_state;
+ }
+ 
+@@ -153,6 +156,9 @@ meta_output_kms_is_color_space_supported (MetaOutput           *output,
+   connector_state =
+     meta_kms_connector_get_current_state (output_kms->kms_connector);
+ 
++  if (!connector_state)
++    return FALSE;
++
+   if (!(connector_state->colorspace.supported & (1 << color_space)))
+     return FALSE;
+ 
+@@ -168,6 +174,9 @@ meta_output_kms_is_hdr_metadata_supported (MetaOutput *output)
+   connector_state =
+     meta_kms_connector_get_current_state (output_kms->kms_connector);
+ 
++  if (!connector_state)
++    return FALSE;
++
+   return connector_state->hdr.supported;
+ }
+