fix timeout in windows

[mmitti]

Visual studio 2019 + Boost 1.71.0 + Windows 10 64bit

I use boost test with timeout(240) like below, it will timeout error.

BOOST_AUTO_TEST_CASE(TEST, *boost::unit_test::timeout(240)) {
    BOOST_TEST_INFO(1);
}

DueTime is 64bit, but static_cast<signed long int>(p_timeout) * 10 will 32bit and timeout value will overflow.

[raffienficiaud]

Replaced with LONGLONG instead. Currently building in the branch topic/PR-232-fix-timeout-in-windows. Thanks!

[codecov]

Codecov Report

Merging #232 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #232   +/-   ##
========================================
  Coverage    55.78%   55.78%           
========================================
  Files          112      112           
  Lines         5890     5890           
  Branches      2380     2380           
========================================
  Hits          3286     3286           
  Misses         778      778           
  Partials      1826     1826

Impacted Files	Coverage Δ
include/boost/test/impl/execution_monitor.ipp	38.02% <ø> (ø)	⬆️

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[raffienficiaud]

Merged to master, thanks!