Fix the 'nm' -> segfault bug (on the vendor branch). This has been fixed

the same way in the cygnus base source.  The problem was that bfd was
writing to memory obtained from malloc(0).    The next import will update
this if necessary.  I'm not sure of the origins of this patch.

Discussed with: obrien

contrib/binutils/bfd/syms.c

@@ -715,6 +715,8 @@ _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep)
     storage = bfd_get_symtab_upper_bound (abfd);
   if (storage < 0)
     goto error_return;
+  if (storage == 0)
+    return 0;
 
   syms = (asymbol **) bfd_malloc ((size_t) storage);
   if (syms == NULL)