[gnome-software: 1/2] flatpak: Ensure silo is valid when calling add_category_apps()

[Philip Withnall <pwithnall src gnome org>]

commit b0df749628645c8f581651b403e00ba7e4101740
Author: Philip Withnall <pwithnall endlessos org>
Date:   Wed Mar 24 16:04:12 2021 +0000

    flatpak: Ensure silo is valid when calling add_category_apps()
    
    Every other vfunc implementation in `gs-flatpak.c` does the same. This
    should hopefully prevent the critical warnings seen in #1129.
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    
    Fixes: #1129

 plugins/flatpak/gs-flatpak.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/plugins/flatpak/gs-flatpak.c b/plugins/flatpak/gs-flatpak.c
index fbbd0e33b..1ae7943df 100644
--- a/plugins/flatpak/gs-flatpak.c
+++ b/plugins/flatpak/gs-flatpak.c
@@ -3474,6 +3474,10 @@ gs_flatpak_add_category_apps (GsFlatpak *self,
                              GError **error)
 {
        g_autoptr(GRWLockReaderLocker) locker = NULL;
+
+       if (!gs_flatpak_rescan_appstream_store (self, cancellable, error))
+               return FALSE;
+
        locker = g_rw_lock_reader_locker_new (&self->silo_lock);
        return gs_appstream_add_category_apps (self->plugin, self->silo,
                                               category, list,