Index: trunk/psLib/src/math/psStats.c
===================================================================
--- trunk/psLib/src/math/psStats.c	(revision 18876)
+++ trunk/psLib/src/math/psStats.c	(revision 20514)
@@ -13,6 +13,6 @@
  * use ->min and ->max (PS_STAT_USE_RANGE)
  *
- *  @version $Revision: 1.228 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2008-08-03 20:54:43 $
+ *  @version $Revision: 1.229 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2008-11-04 00:54:12 $
  *
  *  Copyright 2006 IfA, University of Hawaii
@@ -651,5 +651,5 @@
         // b) compute new mean and stdev
         // Allocate a psStats structure for calculating the mean and stdev.
-	// XXX Can we just use this psStats structure to calculate the SAMPLE MEAN and STDEV?
+        // XXX Can we just use this psStats structure to calculate the SAMPLE MEAN and STDEV?
         // psStats *statsTmp = psStatsAlloc(PS_STAT_SAMPLE_MEAN | PS_STAT_SAMPLE_STDEV);
         // vectorSampleMean(myVector, errors, tmpMask, maskVal, statsTmp);
@@ -932,5 +932,5 @@
             for (long i = 0 ; i < myVector->n ; i++) {
                 if ((myVector->data.F32[i] < medianLo) || (myVector->data.F32[i] > medianHi)) {
-		    // XXXX is this correct?  is MASK_MARK safe?
+                    // XXXX is this correct?  is MASK_MARK safe?
                     mask->data.U8[i] |= MASK_MARK;
                     psTrace(TRACE, 6, "Masking element %ld is %f\n", i, myVector->data.F32[i]);
@@ -2381,4 +2381,6 @@
 psStatsOptions psStatsOptionFromString(const char *string)
 {
+    PS_ASSERT_STRING_NON_EMPTY(string, PS_STAT_NONE);
+
 #define READ_STAT(NAME, SYMBOL) \
     if (strcasecmp(string, NAME) == 0) { \
@@ -2419,5 +2421,5 @@
 
     psError(PS_ERR_BAD_PARAMETER_VALUE, true, "Unable to parse statistic: %s\n", string);
-    return 0;
+    return PS_STAT_NONE;
 }