[evince/1120-gnome-3-32-evince-crashed] ev_window: prevent NULL metadata being passed

[Nelson Benítez León <nbenitez src gnome org>]

commit 5197ad062f3c556fe20b985295ea2de68c16b1a0
Author: Nelson Benítez León <nbenitezl gmail com>
Date:   Fri Mar 29 23:10:29 2019 -0400

    ev_window: prevent NULL metadata being passed
    
    to ev_metadata_get_int() function inside
    ev_window_get_metadata_sidebar_size().
    
    This could happen if the pdf file returned
    false for ev_is_metadata_supported_for_file()
    
    Fixes issue #1120

 shell/ev-window.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/shell/ev-window.c b/shell/ev-window.c
index 21bb599b..6f271e55 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -7863,6 +7863,9 @@ ev_window_get_metadata_sidebar_size (EvWindow *ev_window)
 
        priv = GET_PRIVATE (ev_window);
 
+       if (!priv->metadata)
+               return 0;
+
        if (ev_metadata_get_int (priv->metadata, "sidebar_size", &sidebar_size))
                return sidebar_size;