[Bug libstdc++/68519] condition_variable::wait_for does not work properly with float duration

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68519

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

           What    |Removed                     |Added
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   Target Milestone|8.0                         |7.4

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 7.4 too.