C++ PATCH for core DR 2007

[Jason Merrill]

DR 2007 points out that there's no need to do argument-dependent lookup 
for operator=, which has to be a member function.

Tested x86_64-pc-linux-gnu, applying to trunk.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dr2007.patch
Type: text/x-patch
Size: 2139 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20141110/39c3a270/attachment.bin>