Fixed bug 3529 - SDL_EGL_UnloadLibrary is not called at all on SDL_Quit

kaisyu

In case of OpenGLES, the sequences of loading and unloading driver library should be like that:

SDL_Init
  ...
  SDL_GL_LoadLibrary
    SDL_EGL_LoadLibrary
...
SDL_Quit
  ...
  SDL_GL_UnloadLibrary
    SDL_EGL_UnloadLibrary
...


However, according to my test results, the varible '_this->gl_config.driver_loaded' does not allow 'SDL_GL_UnloadLibrary' to call 'SDL_EGL_UnloadLibrary'.

src/video/emscripten/SDL_emscriptenopengles.c

@@ -70,8 +70,6 @@ Emscripten_GLES_LoadLibrary(_THIS, const char *path) {
         return SDL_SetError("Could not initialize EGL");
     }
 
-    _this->gl_config.driver_loaded = 1;
-
     if (path) {
         SDL_strlcpy(_this->gl_config.driver_path, path, sizeof(_this->gl_config.driver_path) - 1);
     } else {