--- a/libtommath/bn_mp_add_d.c	Tue Jan 23 23:27:40 2018 +0800
+++ b/libtommath/bn_mp_add_d.c	Sat Feb 17 19:29:51 2018 +0800
@@ -49,9 +49,6 @@
   /* old number of used digits in c */
   oldused = c->used;
 
-  /* sign always positive */
-  c->sign = MP_ZPOS;
-
   /* source alias */
   tmpa    = a->dp;
 
@@ -96,6 +93,9 @@
      ix       = 1;
   }
 
+  /* sign always positive */
+  c->sign = MP_ZPOS;
+
   /* now zero to oldused */
   while (ix++ < oldused) {
      *tmpc++ = 0;
@@ -107,6 +107,6 @@
 
 #endif
 
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */