Index: trunk/psLib/src/imageops/psImageMapFit.c
===================================================================
--- trunk/psLib/src/imageops/psImageMapFit.c	(revision 21183)
+++ trunk/psLib/src/imageops/psImageMapFit.c	(revision 23989)
@@ -73,5 +73,8 @@
 
         // XXX does ROBUST_MEDIAN work with weight?
-        psVectorStats(map->stats, f, NULL, mask, maskValue);
+        if (!psVectorStats(map->stats, f, NULL, mask, maskValue)) {
+	    psError(PS_ERR_UNKNOWN, false, "failure to measure stats");
+	    return false;
+	}
 
         map->map->data.F32[0][0]   = psStatsGetValue(map->stats, mean);