[Patch] Further fix for 12658

[Paolo Carlini]

Benjamin Kosnik wrote:

>>What about the branch, where the locking code is different? An 
>>appropriate backport seems definitely feasible...
>>    
>>
>I agree! I think the infrastructure is there to use the locks, so we
>should. Since there are a couple of bugs about this stuff, it would be
>wise IMHO to backport the locale locking fixes to gcc-3.4.
>  
>
Agreed! I will post soon what would go in 3_4-branch...

Paolo.