[Bug libstdc++/64657] Support iterators with overloaded operator-comma

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64657

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-01-18
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 34477
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34477&action=edit
Cast expressions to void when separated by comma

This patch fixes all the places I found. I'll commit it during stage1.