Fixed windows compile

src/sinks/wincolor_sink.cpp

@@ -125,17 +125,21 @@ void wincolor_sink<Mutex>::write_to_file_(const memory_buf_t &formatted) {
 template class SPDLOG_API wincolor_stdout_sink<std::mutex>;
 template class SPDLOG_API wincolor_stdout_sink<details::null_mutex>;
 
+template<>
 wincolor_stdout_sink<std::mutex>::wincolor_stdout_sink(color_mode mode)
     : wincolor_sink<std::mutex>(::GetStdHandle(STD_OUTPUT_HANDLE), mode) {}
 
 
+template<>
 wincolor_stdout_sink<details::null_mutex>::wincolor_stdout_sink(color_mode mode)
     : wincolor_sink<details::null_mutex>(::GetStdHandle(STD_OUTPUT_HANDLE), mode) {}
 
 // wincolor_stderr_sink
+template<>
 wincolor_stderr_sink<std::mutex>::wincolor_stderr_sink(color_mode mode)
     : wincolor_sink<std::mutex>(::GetStdHandle(STD_ERROR_HANDLE), mode) {}
 
+template<>
 wincolor_stderr_sink<details::null_mutex>::wincolor_stderr_sink(color_mode mode)
     : wincolor_sink<details::null_mutex>(::GetStdHandle(STD_ERROR_HANDLE), mode) {}