Quick question re: after-open file handler

[Lord-Kamina]

Say I want to use the the after-open file handler callback for a sink with std::fputs, as per the example in README.

Should I take care to error-check the call to std::fputs, or the stream after its done, or will spdlog do that later on its own?

[tt4g]

spdlog does not check for errors after the callback call:

spdlog/include/spdlog/details/file_helper-inl.h

Lines 52 to 57 in e593f66

	if (!os::fopen_s(&fd_, fname, mode)) {
	if (event_handlers_.after_open) {
	event_handlers_.after_open(filename_, fd_);
	}
	return;
	}

Handling of errors that occur in the callback should be handled in the callback.