Update to v094r01 release.

byuu says:

Changelog:
- port: various compilation fixes for OS X [kode54]
- nall: added programpath() function to return path to process binary
  [todo: need to have ethos use this function]
- ruby: XAudio2 will select default game sound device instead of first
  sound device
- ruby: DirectInput device IDs are no longer ambiguous when VID+PID are
  identical
- ruby: OpenGL won't try and terminate if it hasn't been initialized
- gb: D-pad up+down/left+right not masked in SGB mode
- sfc: rewrote ICD2 video rendering to output in real-time, work with
  cycle-based Game Boy renderer
- sfc: rewrote Bus::reduce(), reduces game loading time by about 500ms
- ethos: store save states in {game}/higan/* instead of {game}/bsnes/*
- loki: added target-loki/ (blank stub for now)
- Makefile: purge out/* on make clean

ruby/video/opengl/main.hpp

@@ -200,11 +200,13 @@ bool OpenGL::init() {
   glrLinkProgram(program);
 
   shader(nullptr);
-  return true;
+  return initialized = true;
 }
 
 void OpenGL::term() {
+  if(initialized == false) return;
   shader(nullptr);  //release shader resources (eg frame[] history)
   OpenGLSurface::release();
   if(buffer) { delete[] buffer; buffer = nullptr; }
+  initialized = false;
 }

ruby/video/opengl/opengl.hpp

@@ -79,6 +79,7 @@ struct OpenGL : OpenGLProgram {
     Setting(const string& name, const string& value) : name(name), value(value) {}
   };
   set<Setting> settings;
+  bool initialized = false;
 
   void shader(const char* pathname);
   void allocateHistory(unsigned size);