Index: trunk/psphot/src/psphotGrowthCurve.c
===================================================================
--- trunk/psphot/src/psphotGrowthCurve.c	(revision 9837)
+++ trunk/psphot/src/psphotGrowthCurve.c	(revision 9889)
@@ -45,4 +45,6 @@
 
     // loop over a range of source fluxes
+    // no need to interpolate since we have force the object center 
+    // to 0.5, 0.5 above
     for (int i = 0; i < psf->growth->radius->n; i++) {