[librsvg/librsvg-2.48] Update NEWS

[Federico Mena Quintero <federico src gnome org>]

commit bf2c89ab3462f1f96aec2350cdf5b728b6354284
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Apr 30 16:27:31 2020 -0500

    Update NEWS

 NEWS | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/NEWS b/NEWS
index 7f9ed3c2..02560681 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,8 @@ Version 2.48.5
 
 - #591 - Catch overflow when rendering files with a huge viewBox.
 
+- #593 - Don't panic with an empty objectBoundingBox for a mask.
+
 Version 2.48.4
 
 - #590 - Fix regression when rendering masks.