===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/engine/nd.c,v
retrieving revision 1.142
retrieving revision 1.143
diff -u -p -r1.142 -r1.143
--- OpenXM_contrib2/asir2000/engine/nd.c	2006/08/09 02:43:38	1.142
+++ OpenXM_contrib2/asir2000/engine/nd.c	2006/08/09 02:48:49	1.143
@@ -1,4 +1,4 @@
-/* $OpenXM: OpenXM_contrib2/asir2000/engine/nd.c,v 1.141 2006/06/17 10:12:06 noro Exp $ */
+/* $OpenXM$ */
 
 #include "nd.h"
 
@@ -1548,8 +1548,7 @@ int do_diagonalize(int sugar,int m)
 	Q q,num,den;
 	union oNDC dn;
 
-	for ( i = nd_psn-1; i >= 0; i-- ) {
-		if ( SG(nd_psh[i]) != sugar ) continue;
+	for ( i = nd_psn-1; i >= 0 && SG(nd_psh[i]) == sugar; i-- ) {
 		if ( nd_demand )
 			nfv = ndv_load(i);
 		else
@@ -1677,8 +1676,7 @@ int do_diagonalize_trace(int sugar,int m)
 	Q q,den,num;
 	union oNDC dn;
 
-	for ( i = nd_psn-1; i >= 0; i-- ) {
-		if ( SG(nd_psh[i]) != sugar ) continue;
+	for ( i = nd_psn-1; i >= 0 && SG(nd_psh[i]) == sugar; i-- ) {
 		/* for nd_ps */
 		s = ndvtond(m,nd_ps[i]);
 		s = nd_separate_head(s,&head);