[PATCH] fix for pr 57474

[Jeff Law]

On 05/31/2013 06:28 PM, Iyer, Balaji V wrote:
> Hello Everyone,
> 	PR reports that sec_implicit2 and sec_implicit regression tests were failing in darwin. I looked into it and it is due to an uninitialized variable (rhs_length). This patch pasted below should fix that issue. Is this OK for trunk?
>
> Here are the ChangeLog entries:
>
> 2013-05-31  Balaji V. Iyer  <balaji.v.iyer@intel.com>
>          PR c/57474
>          * c-array-notation.c (build_array_notation_expr): Initialized rhs_length
>          array to NULL_TREE if they are unused.  Also added a check for the
>          field to be NULL before its fields are used in future.
Does lhs_length need similar initialization & checks?  If not, why?

jeff