Update Umbra submodule.

This is a regression of the event lag issues until events are switched
over to SDL.

src/screen.cpp

@@ -138,7 +138,7 @@ bool Screen::update() {
 		}
 		if (fadeEnded) fadeLvl=0.0f;
 	}
-    return update(elapsed, key, ms);
+    return update(elapsed, key_, mouse_);
 }
 
 void Screen::setFadeIn (int lengthInMilli, TCODColor col) {

src/screen.hpp

@@ -31,9 +31,10 @@ public :
 	virtual void render() = 0;
 	virtual bool update(float elapsed, TCOD_key_t &k,TCOD_mouse_t &mouse) = 0;
 	virtual ~Screen() {}
-	void keyboard (TCOD_key_t &key) { this->key=key; }
-	void mouse (TCOD_mouse_t &ms) { this->ms=ms; }
+	void keyboard (TCOD_key_t &key) { key_ = key; }
+	void mouse (TCOD_mouse_t &mouse) { mouse_ = mouse; }
 	bool update (void);
+	void onEvent (const SDL_Event&) override {}
 
     void setFadeIn (int lengthInMilli, TCODColor col = TCODColor::black); //set fade lengths in milliseconds
     void setFadeOut (int lengthInMilli, TCODColor col = TCODColor::black); //set fade lengths in milliseconds
@@ -47,8 +48,8 @@ protected :
     TCODColor fadeOutColor;
 
 	enum { FADE_UP, FADE_DOWN, FADE_OFF, FADE_NONE } fade;
-	TCOD_key_t key{};
-	TCOD_mouse_t ms{};
+	[[deprecated]] TCOD_key_t key_{};
+	[[deprecated]] TCOD_mouse_t mouse_{};
 	void onInitialise();
 	void prepareImage(TCODImage *img)const;
 	TCODImage *loadChapterPicture(bool big=false);