[patch] libstdc++/60497 (again) - qualify more calls

[Jonathan Wakely]

My fix for PR 60497 didn't cover the rvalue overloads of std::get.

I also noticed we don't handle comparisons properly if tuple elements
have perverse overloaded comparison operators.

Tested x86_64-linux, committed to trunk.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: patch.txt
Type: text/x-patch
Size: 4394 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20140513/1cb48336/attachment.bin>