MYST3: Fix the last frame of simple movies not being played

Fixes #1310.

engines/myst3/movie.cpp

@@ -390,7 +390,7 @@ SimpleMovie::SimpleMovie(Myst3Engine *vm, uint16 id) :
 	_startEngineTick = _vm->_state->getTickCount();
 }
 
-bool SimpleMovie::update() {
+void SimpleMovie::update() {
 	if (_bink.getCurFrame() < (_startFrame - 1)) {
 		_bink.seekToFrame(_startFrame - 1);
 	}
@@ -428,8 +428,10 @@ bool SimpleMovie::update() {
 			drawNextFrameToTexture();
 		}
 	}
+}
 
-	return !_bink.endOfVideo() && _bink.getCurFrame() < _endFrame;
+bool SimpleMovie::endOfVideo() {
+	return _bink.endOfVideo() || _bink.getCurFrame() >= _endFrame;
 }
 
 void SimpleMovie::playStartupSound() {

engines/myst3/movie.h

@@ -154,7 +154,8 @@ public:
 	SimpleMovie(Myst3Engine *vm, uint16 id);
 	virtual ~SimpleMovie();
 
-	bool update();
+	void update();
+	bool endOfVideo();
 
 	void playStartupSound();
 

engines/myst3/myst3.cpp

@@ -1160,7 +1160,9 @@ void Myst3Engine::playSimpleMovie(uint16 id, bool fullframe) {
 
 	bool skip = false;
 
-	while (!skip && !shouldQuit() && movie.update()) {
+	while (!skip && !shouldQuit() && !movie.endOfVideo()) {
+		movie.update();
+
 		// Process events
 		Common::Event event;
 		while (getEventManager()->pollEvent(event))