bug#17576: [PATCH] dfa: speed-up at initial state

[Norihiro Tanaka]

Paul Eggert wrote:
> I don't think we need to complicate the code to improve optimization
> with older compilers.

Thanks for the confirmation.  Two results of last are with not GCC 4.4.7
but GCC 4.8.2 after applying second patch.  The test case "k" is 50%
faster and "l" is also about 16% faster with GCC 4.8.2 on my platform by
two changes.