* fixed missing APIENTRY prefixes for windows MSVC

include/ACGL/OpenGL/Debug.hh

@@ -26,7 +26,7 @@ const char *debugSeverityName( GLenum _type );
 void ACGLRegisterDefaultDebugCallback();
 
 //! default debug callback
-void ACGL_KHR_default_debug_callback( GLenum _source, GLenum _type, GLuint _id, GLenum _severity, GLsizei _length, const GLchar *_message, const void *_userParam);
+void APIENTRY ACGL_KHR_default_debug_callback( GLenum _source, GLenum _type, GLuint _id, GLenum _severity, GLsizei _length, const GLchar *_message, const void *_userParam);
 
 } // OpenGL
 } // ACGL

src/ACGL/OpenGL/Debug.cc

@@ -65,7 +65,7 @@ void ACGLRegisterDefaultDebugCallback()
 }
 
 //! place a brakepoint in here to find the source of a problem!
-void ACGL_KHR_default_debug_callback( GLenum _source, GLenum _type, GLuint _id, GLenum _severity, GLsizei _length, const GLchar *_message, const void *_userParam)
+void APIENTRY ACGL_KHR_default_debug_callback( GLenum _source, GLenum _type, GLuint _id, GLenum _severity, GLsizei _length, const GLchar *_message, const void *_userParam)
 {
     ostream& stream = (_type == GL_DEBUG_TYPE_ERROR) ? static_cast<ostream&>(error()) : static_cast<ostream&>(debug());
 

src/ACGL/OpenGL/glloaders/KHR_debug_emulator.cc

@@ -598,7 +598,7 @@ void APIENTRY KHR_DEBUG_EMULATOR_CHECK_GL_ERROR();
 // glGetError
 //   needs to return the last error even if this KHR_debug emulator already got the error code
 //
-GLenum KHR_DEBUG_EMULATOR_GetError() {
+GLenum APIENTRY KHR_DEBUG_EMULATOR_GetError() {
     // if there was an error, report it. if not report the last global error
     // which might got set by the automatic error checks
     GLenum currentError = _original_glGetError();