Problem report c++/5710.

[R. Clayton]

I recently submitted problem report c++/5710 about g++'s handling of
assignments into fields of structs in vectors when the rhs is a function.  I
have since reconsidered the problem and convinced myself that the problem was
in my code, caused by a side-effecting re-allocation of the vector during the
function call.

I would like to retract the error report and apologize for any inconvenience it
may have caused.