*** lib/regex_internal.c.ORIG	Thu May  7 16:24:38 2009
--- lib/regex_internal.c	Thu May  7 16:25:10 2009
***************
*** 969,974 ****
--- 969,977 ----
  internal_function
  re_node_set_alloc (re_node_set *set, Idx size)
  {
+   if ( size == 0 )
+     return REG_NOERROR;
+ 
    set->alloc = size;
    set->nelem = 0;
    set->elems = re_malloc (Idx, size);