[gnome-games/cherry-pick-549773c5] collection-icon-view: Check filtering text for null

[Alexander Mikhaylenko <alexm src gnome org>]

commit 83014ad65c6816c8c26309c2a2e5772cd9044860
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Sat Oct 6 19:05:36 2018 +0000

    collection-icon-view: Check filtering text for null
    
    Prevents runtime errors when setting null as filtering text.
    
    
    (cherry picked from commit 549773c5f7a881910fd85dac200cc1eef30fcee0)

 src/ui/collection-icon-view.vala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/ui/collection-icon-view.vala b/src/ui/collection-icon-view.vala
index dd1b8dbb..1a06fc4a 100644
--- a/src/ui/collection-icon-view.vala
+++ b/src/ui/collection-icon-view.vala
@@ -7,7 +7,9 @@ private class Games.CollectionIconView : Gtk.Bin {
        private string[] filtering_terms;
        public string filtering_text {
                set {
-                       filtering_terms = value.split (" ");
+                       if (value != null)
+                               filtering_terms = value.split (" ");
+
                        flow_box.invalidate_filter ();
                }
        }