[glib/wip/hadess/avoid-all-remote-files-crash] gcontenttype: Fix crash in _get_generic_icon_name()

[Bastien Nocera <hadess src gnome org>]

commit a7181ad39761d51ddac408c022e35eaf2d8f5827
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Feb 28 15:09:50 2020 +0100

    gcontenttype: Fix crash in _get_generic_icon_name()
    
    Guard against NULL type being passed to
    g_content_type_get_generic_icon_name() just as we protect
    g_content_type_get_description(), otherwise it will cause a crash.
    
    See https://gitlab.gnome.org/GNOME/gtk/issues/2482

 gio/gcontenttype.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gio/gcontenttype.c b/gio/gcontenttype.c
index 04d278db3..2716c8981 100644
--- a/gio/gcontenttype.c
+++ b/gio/gcontenttype.c
@@ -614,6 +614,8 @@ g_content_type_get_generic_icon_name (const gchar *type)
   const gchar *xdg_icon_name;
   gchar *icon_name;
 
+  g_return_val_if_fail (type != NULL, NULL);
+
   G_LOCK (gio_xdgmime);
   xdg_icon_name = xdg_mime_get_generic_icon (type);
   G_UNLOCK (gio_xdgmime);