[gnome-music/wip/mschraal/albumsview-cover-on-demand-fixes-3-34: 1/2] albumsview: Fix issue with zero sized covers

[Marinus Schraal <mschraal src gnome org>]

commit 4e94089f5a3bedf89f0e9c576a2aa862e78f5c05
Author: Marinus Schraal <mschraal gnome org>
Date:   Wed Nov 6 17:08:37 2019 +0100

    albumsview: Fix issue with zero sized covers
    
    In some circumstances the AlbumCover size might still be 0x0, triggering
    a division by zero.
    
    Check for AlbumCover size being 0 and stop cover retrieval.

 gnomemusic/views/albumsview.py | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gnomemusic/views/albumsview.py b/gnomemusic/views/albumsview.py
index 7836f86d..09502357 100644
--- a/gnomemusic/views/albumsview.py
+++ b/gnomemusic/views/albumsview.py
@@ -112,6 +112,9 @@ class AlbumsView(Gtk.Stack):
 
         first_cover = self._flowbox.get_child_at_index(0)
         cover_size, _ = first_cover.get_allocated_size()
+        if cover_size.width == 0 or cover_size.height == 0:
+            return GLib.SOURCE_REMOVE
+
         viewport_size, _ = self._viewport.get_allocated_size()
 
         h_space = self._flowbox.get_column_spacing()