missing include guards on {bits,tr1}/shared_ptr.h

[Jonathan Wakely]

2009/3/11 Paolo Carlini:
> Hi Jon,
>> This is not technically a regression, because those headers didn't
>> exist in GCC 4.3 and are not meant to be included by users anyway.
>> Should a fix wait for 4.4.1, or can it go in now?
>>
> Can go in now, definitely.

Thanks, Paolo. Both those patches are in, and I feel like less of an
idiot now ;-)

Jon