[gnome-applets] tracker-search-bar: avoid critical warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 8a86194b7e436e52a99b5c05af2c6768216b0daf
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Apr 7 03:50:11 2020 +0300

    tracker-search-bar: avoid critical warnings

 gnome-applets/tracker-search-bar/tracker-applet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gnome-applets/tracker-search-bar/tracker-applet.c 
b/gnome-applets/tracker-search-bar/tracker-applet.c
index 76c7ba3ce..d95ae7b84 100644
--- a/gnome-applets/tracker-search-bar/tracker-applet.c
+++ b/gnome-applets/tracker-search-bar/tracker-applet.c
@@ -297,7 +297,7 @@ applet_size_allocate_cb (GtkWidget     *widget,
                new_size = allocation->height;
        }
 
-       if (applet->size != new_size) {
+       if (applet->image != NULL && applet->size != new_size) {
                applet->size = new_size;
 
                gtk_image_set_pixel_size (GTK_IMAGE (applet->image), applet->size - 2);