Index: trunk/psphot/src/test_psf_scatter.c
===================================================================
--- trunk/psphot/src/test_psf_scatter.c	(revision 4114)
+++ trunk/psphot/src/test_psf_scatter.c	(revision 4115)
@@ -71,7 +71,7 @@
 
     psPolynomial1D *dsxLine = psPolynomial1DAlloc (2, PS_POLYNOMIAL_ORD);
-    psVectorFitPolynomial1D (dsxLine, snBin, dsxBin, NULL);
+    psVectorFitPolynomial1D (dsxLine, NULL, snBin, dsxBin, NULL);
     psPolynomial1D *dsyLine = psPolynomial1DAlloc (2, PS_POLYNOMIAL_ORD);
-    psVectorFitPolynomial1D (dsyLine, snBin, dsyBin, NULL);
+    psVectorFitPolynomial1D (dsyLine, NULL, snBin, dsyBin, NULL);
     // these should have a slope of 1.0
     psPolynomial1DDump (dsxLine);