[3.3] Patch for PR c/15549

[Gabriel Dos Reis]

Josef Zlomek <zlomj9am@artax.karlin.mff.cuni.cz> writes:

| Hello,
| 
| following patch fixes PR c/15549.

Thanks.

| Bootstrapping 3.3 branch in progress.

Please don't apply this before the branch is unfrozen.  

I'll send specific instructions for that.

-- Gaby