Index: /branches/eam_branches/ohana.20190329/src/libdvo/src/dvosorts.c
===================================================================
--- /branches/eam_branches/ohana.20190329/src/libdvo/src/dvosorts.c	(revision 40749)
+++ /branches/eam_branches/ohana.20190329/src/libdvo/src/dvosorts.c	(revision 40750)
@@ -76,5 +76,6 @@
 }
 
-/* sort a coordinate pair (X,Y) and the associated index (S) */
+/* sort the index of a coordinate pair (X,Y) on X (vector pair stays unsorted) */
+// XXX isn't this function equivalent to dsort_indexonly?
 void sort_coords_indexonly (double *X, double *Y, off_t *S, off_t N) {
   OHANA_UNUSED_PARAM(Y);