From c81720d57b093da6ab9eb06d9ccc69bc12d297f6 Mon Sep 17 00:00:00 2001
From: David Berry <d.berry@eaobservatory.org>
Date: Thu, 3 Oct 2019 11:33:39 +0100
Subject: [PATCH] astEqual: Check neither object is NULL

---
 component.xml | 2 +-
 object.c      | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/component.xml b/component.xml
index 9674e85d..da17d654 100644
--- a/component.xml
+++ b/component.xml
@@ -2,7 +2,7 @@
 <!DOCTYPE component SYSTEM "componentinfo.dtd">
 
 <component id="ast" support="S">
-  <version>8.8.0</version>
+  <version>9.0.0</version>
   <path>libext/ast</path>
   <description>WCS library</description>
   <abstract>
diff --git a/object.c b/object.c
index 6cffb919..825ee59e 100644
--- a/object.c
+++ b/object.c
@@ -5875,6 +5875,7 @@ int astManageLock_( AstObject *this, int mode, int extra, AstObject **fail,
 int astEqual_( AstObject *this, AstObject *that, int *status ) {
    if ( !astOK ) return 0;
    if( this == that ) return 1;
+   if( !this || !that ) return 0;
    return (**astMEMBER(this,Object,Equal))( this, that, status );
 }
 const char *astGetAttrib_( AstObject *this, const char *attrib, int *status ) {