Index: trunk/psLib/src/imageops/psImageConvolve.c
===================================================================
--- trunk/psLib/src/imageops/psImageConvolve.c	(revision 5783)
+++ trunk/psLib/src/imageops/psImageConvolve.c	(revision 6226)
@@ -5,6 +5,6 @@
  *  @author Robert DeSonia, MHPCC
  *
- *  @version $Revision: 1.29 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2005-12-14 00:47:27 $
+ *  @version $Revision: 1.30 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2006-01-27 20:08:58 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -491,4 +491,5 @@
                     double  Nsigma)
 {
+    PS_ASSERT_IMAGE_NON_NULL(image, NULL);
 
     int Nx, Ny, Npixel, Nrange;