regx/fwd: correctly handle node names with multiple set of digits

Refs. open-mpi/ompi#4689

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>

orte/mca/regx/fwd/regx_fwd.c

@@ -170,14 +170,12 @@ static int nidmap_create(opal_pointer_array_t *pool, char **regex)
         len = strlen(node);
         startnum = -1;
         memset(prefix, 0, ORTE_MAX_NODE_PREFIX);
-        numdigits = 0;
         for (i=0, j=0; i < len; i++) {
             /* valid hostname characters are ascii letters, digits and the '-' character. */
             if (isdigit(node[i])) {
                 /* count the size of the numeric field - but don't
                  * add the digits to the prefix
                  */
-                numdigits++;
                 if (startnum < 0) {
                     /* okay, this defines end of the prefix */
                     startnum = i;
@@ -204,8 +202,10 @@ static int nidmap_create(opal_pointer_array_t *pool, char **regex)
         nodenum = strtol(&node[startnum], &sfx, 10);
         if (NULL != sfx) {
             suffix = strdup(sfx);
+            numdigits = (int)(sfx - &node[startnum]);
         } else {
             suffix = NULL;
+            numdigits = (int)strlen(&node[startnum]);
         }
         /* is this node name already on our list? */
         found = false;