[PATCH] Fix another ARM GAS segment fault

[Nick Clifton]

Hi Jie,

> Even with the patch
>
> http://sourceware.org/ml/binutils/2010-03/msg00262.html
>
> there is still another case which will cause ARM GAS to crash. It's
> possible that a new mapping symbol will be created at address 0 while
> there is already another mapping symbol at address 0. So when we see
> value == 0, we cannot assert first_map == NULL. This patch fixes it. No
> regressions. Is it OK?

Approved - please apply.

Cheers
   Nick