===================================================================
RCS file: Array.cc,v
retrieving revision 1.1
diff -u -r1.1 Array.cc
--- Array.cc	2010/11/08 17:11:25	1.1
+++ Array.cc	2010/11/09 14:18:35
@@ -2298,7 +2298,7 @@
   octave_sort<T> lsort;
 
   // If mode is still unknown, compare lo and hi
-  if (! mode)
+  if (mode == UNSORTED)
     {
       if (lsort.descending_compare (*lo, *hi))
         mode = DESCENDING;
@@ -2360,7 +2360,7 @@
   if (r <= 1 || c == 0)
     return mode ? mode : ASCENDING;
 
-  if (! mode)
+  if (mode == UNSORTED)
     {
       // Auto-detect mode.
       compare_fcn_type compare
@@ -2391,11 +2391,11 @@
                 mode = DESCENDING;
             }
         }
-      if (! mode && i == cols ())
+      if (mode == UNSORTED && i == cols ())
         mode = ASCENDING;
     }
 
-  if (mode)
+  if (mode != UNSORTED)
     {
       lsort.set_compare (sortrows_comparator (mode, *this, false));