Index: trunk/psModules/src/objects/pmSourceUtils.c
===================================================================
--- trunk/psModules/src/objects/pmSourceUtils.c	(revision 14938)
+++ trunk/psModules/src/objects/pmSourceUtils.c	(revision 15562)
@@ -6,6 +6,6 @@
  *  @author EAM, IfA: significant modifications.
  *
- *  @version $Revision: 1.3 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2007-09-21 00:09:05 $
+ *  @version $Revision: 1.4 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2007-11-10 01:09:20 $
  *
  *  Copyright 2004 Maui High Performance Computing Center, University of Hawaii
@@ -63,5 +63,9 @@
 }
 
-pmSource *pmSourceFromModel (pmModel *model, pmReadout *readout, float radius, pmSourceType type) {
+pmSource *pmSourceFromModel (pmModel *model, pmReadout *readout, float radius, 
+                             pmSourceType type)
+{
+    PS_ASSERT_PTR_NON_NULL(model, NULL);
+    PS_ASSERT_PTR_NON_NULL(readout, NULL);
 
     pmSource *source = pmSourceAlloc ();