Work around RG350 joystick mode kernel bug

SourceX/miniwin/misc_msg.cpp

@@ -366,6 +366,11 @@ WINBOOL PeekMessageA(LPMSG lpMsg, HWND hWnd, UINT wMsgFilterMin, UINT wMsgFilter
 	}
 #endif
 
+	if ((e.type == SDL_KEYUP || e.type == SDL_KEYDOWN) && e.key.keysym.sym == SDLK_UNKNOWN) {
+		// Erroneous events generated by RG350 kernel.
+		return true;
+	}
+
 	if (ProcessControllerMotion(e)) {
 		ScaleJoysticks();
 		return true;
@@ -470,7 +475,7 @@ WINBOOL PeekMessageA(LPMSG lpMsg, HWND hWnd, UINT wMsgFilterMin, UINT wMsgFilter
 	case SDL_KEYUP: {
 		int key = translate_sdl_key(e.key.keysym);
 		if (key == -1)
-			return false_avail("SDL_KEYUP", key);
+			return false_avail(e.type == SDL_KEYDOWN ? "SDL_KEYDOWN" : "SDL_KEYUP", e.key.keysym.sym);
 		lpMsg->message = e.type == SDL_KEYDOWN ? DVL_WM_KEYDOWN : DVL_WM_KEYUP;
 		lpMsg->wParam = (DWORD)key;
 		// HACK: Encode modifier in lParam for TranslateMessage later