tweak asm insert counting

[Ian Lance Taylor]

Nathan Sidwell <nathan@codesourcery.com> writes:

> 2008-07-01  Mark Shinwell  <shinwell@codesourcery.com>
>
> 	* final.c (asm_insn_count): Return zero for an empty asm body.

This is OK if you ran the testsuite (you didn't say).

Thanks.

Ian