Patch libfswatch for Windows latency

[shikokuchuo]

Fixes #32.

Summary of changes:

File: src/fswatch-5c443d2/libfswatch/src/libfswatch/c++/windows_monitor.cpp

Add headers:

#include <thread>
#include <chrono>

Replace line 232:

// OLD:
sleep(latency);

// NEW:
std::this_thread::sleep_for(std::chrono::milliseconds((long long) (latency * 1000)));

Fixes bug:

POSIX sleep() from <unistd.h> has the following signature:

unsigned int sleep(unsigned int seconds);

This leads to an implicit truncation when a double < 1.0 is passed to sleep():
e.g. sleep(0.5) → sleep(0)