Merge pull request #46 from Wenz-jam/master

fix: nvboard is not responding

src/event.cpp

@@ -43,7 +43,7 @@ static void mouseup_handler(const SDL_Event &ev) {
 
 void read_event() {
   SDL_Event ev;
-  SDL_PollEvent(&ev);
+  while (SDL_PollEvent(&ev)) {
     switch (ev.type) {
       case SDL_QUIT: exit(0);
       case SDL_WINDOWEVENT:
@@ -64,3 +64,4 @@ void read_event() {
       case SDL_TEXTINPUT: if (uart_term_get_focus) uart_rx_getchar(ev.text.text[0]); break;
     }
   }
+}