Index: trunk/pswarp/src/pswarpDefine.c
===================================================================
--- trunk/pswarp/src/pswarpDefine.c	(revision 13705)
+++ trunk/pswarp/src/pswarpDefine.c	(revision 13860)
@@ -55,4 +55,5 @@
         pmReadout *readout = pmReadoutAlloc(target); // Target readout
         readout->image = psImageAlloc(numCols, numRows, PS_TYPE_F32);
+        psImageInit(readout->image, NAN);
         psFree(readout);                // Drop reference