libremidi update to v5.4.3 and added virtual midi out as default

include/libremidi/error.hpp

@@ -1,11 +1,15 @@
 #pragma once
 #include <libremidi/config.hpp>
 
+#if !defined(_MSC_VER)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
 #pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
 #include <libremidi/system_error2.hpp>
+#if !defined(_MSC_VER)
 #pragma GCC diagnostic pop
+#endif
 
 #include <functional>
 #include <string_view>
@@ -13,10 +17,15 @@
 
 #if __has_include(<source_location>) && (__cpp_lib_source_location >= 201907L)
   #include <source_location>
-namespace libremidi { using source_location = std::source_location; }
+NAMESPACE_LIBREMIDI
+{
+using source_location = std::source_location;
+}
 #else
-namespace libremidi {
-struct source_location {
+NAMESPACE_LIBREMIDI
+{
+struct source_location
+{
   static source_location current() noexcept { return {}; }
   int line() const noexcept { return -1; }
   int offset() const noexcept { return -1; }
@@ -26,9 +35,9 @@ struct source_location {
 }
 #endif
 
-namespace libremidi
+NAMESPACE_LIBREMIDI
 {
-inline auto from_errc(int ret) noexcept
+inline auto from_errc(int64_t ret) noexcept
 {
   return static_cast<std::errc>(-ret);
 }
@@ -40,8 +49,10 @@ inline auto from_errc(int ret) noexcept
     Note that class behaviour is undefined after a critical error (not
     a warning) is reported.
  */
-using midi_error_callback = std::function<void(std::string_view errorText, const source_location&)>;
-using midi_warning_callback = std::function<void(std::string_view errorText, const source_location&)>;
+using midi_error_callback
+    = std::function<void(std::string_view errorText, const source_location&)>;
+using midi_warning_callback
+    = std::function<void(std::string_view errorText, const source_location&)>;
 }
 
 #if !defined(LIBREMIDI_LOG)