pushed/7.9: [Ada] Do not re-cache symbol-lookup result found from cache lookup.

[Joel Brobecker]

Forgot about the gdb-7.9-branch... Now fixed.

On Mon, Feb 02, 2015 at 07:34:17AM +0400, Joel Brobecker wrote:
> > gdb/ChangeLog:
> > 
> >         PR 17856:
> >         * ada-lang.c (ada_lookup_symbol_list_worker): Do not re-cache
> >         results found in the cache.
> > 
> > Tested on x86_64-linux, no regression.
> 
> Pushed!

-- 
Joel