Index: trunk/psphot/src/psphotFindFootprints.c
===================================================================
--- trunk/psphot/src/psphotFindFootprints.c	(revision 32348)
+++ trunk/psphot/src/psphotFindFootprints.c	(revision 33089)
@@ -35,7 +35,12 @@
         psArray *tmp = pmFootprintArrayGrow(footprints, growRadius);
         psImageConvolveSetThreads(oldThreads);
-        psLogMsg ("psphot", PS_LOG_MINUTIA, "grow footprint coverage by %d pixels, %ld footprints become %ld footprints: %f sec\n", growRadius, footprints->n, tmp->n, psTimerMark ("psphot.footprints"));
-        psFree(footprints);
-        footprints = tmp;
+        psLogMsg ("psphot", PS_LOG_MINUTIA, "grow footprint coverage by %d pixels, %ld footprints become %ld footprints: %f sec\n", growRadius, footprints->n, tmp ? tmp->n : 0, psTimerMark ("psphot.footprints"));
+        if (tmp) {
+            psFree(footprints);
+            footprints = tmp;
+        } else {
+            psLogMsg ("psphot", PS_LOG_WARN, "pmFootprintArray grow returned NULL\n");
+        }
+            
     }