Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 17493)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 17496)
@@ -4,6 +4,6 @@
  *  @author GLG, MHPCC
  *
- *  @version $Revision: 1.89 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2008-04-30 11:32:06 $
+ *  @version $Revision: 1.90 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2008-05-01 19:20:51 $
  *
  *  Copyright 2004-2007 Institute for Astronomy, University of Hawaii
@@ -652,5 +652,5 @@
         PM_ASSERT_READOUT_NON_NULL(ro2, false);
         PM_ASSERT_READOUT_IMAGE(ro2, false);
-        if (numCols != 0 && numRows != 0) {
+        if (numCols == 0 && numRows == 0) {
             numCols = ro2->image->numCols;
             numRows = ro2->image->numRows;