Update to v094r22 release.

byuu says:

I fixed the hiro layout enable bug, so when you go to assign joypad
input, the window disables itself so your input doesn't mess with the
controls.

I added "reset" to the hotkeys, in case you feel like clearing all of
them at once.

I added device selection support and the ability to disable audio
synchronization (run > 60fps) to the ruby/OSS driver. This is exposed in
tomoko's configuration file.

I added checks to stringify so that assigning null char* strings to
nall::string won't cause crashes anymore (technically the crash was in
strlen(), which doesn't check for null strings, but whatever ... I'll do
the check myself.)

I hooked up BrowserDialog::folderSelect() to loading slotted media for
now. Tested it by loading a Game Boy game successfully through the Super
Game Boy. Definitely want to write a custom window for this though, that
looks more like the library dialog.

Remaining issues:
- finish slotted cart loader (SGB, BSX, ST)
- add DIP switch selection window (NSS) [I may end up punting this one
  to v096]
- add more configuration panels (video, audio, timing)

nall/string/cast.hpp

@@ -160,14 +160,14 @@ template<> struct stringify<char*> {
   const char* _data;
   auto data() const -> const char* { return _data; }
   auto size() const -> unsigned { return strlen(_data); }
-  stringify(char* source) : _data(source) {}
+  stringify(char* source) : _data(source ? source : "") {}
 };
 
 template<> struct stringify<const char*> {
   const char* _data;
   auto data() const -> const char* { return _data; }
   auto size() const -> unsigned { return strlen(_data); }
-  stringify(const char* source) : _data(source) {}
+  stringify(const char* source) : _data(source ? source : "") {}
 };
 
 //strings