TONY: Fix dirty rect refresh glitch in the introduction sequence

engines/tony/gfxengine.h

@@ -130,6 +130,7 @@ class RMGfxEngine {
 	// Manage a location
 	uint32 loadLocation(int nLoc, RMPoint ptTonyStart, RMPoint start);
 	void unloadLocation(CORO_PARAM, bool bDoOnExit, uint32 *result);
+	int getCurrentLocation() const { return _nCurLoc; }
 
 	// Freeze and unfreeze
 	void freeze();

engines/tony/window.cpp

@@ -140,11 +140,16 @@ void RMWindow::getNewFrame(RMGfxTargetBuffer &bigBuf, Common::Rect *rcBoundEllip
 	// Get a pointer to the bytes of the source buffer
 	byte *lpBuf = bigBuf;
 
+	// FIXME: The current dirty rect handling code has a minor issue with screen refresh in one 
+	// scene in the introduction sequence as the scene changes. For now, we're working around the 
+	// problem by explicitly having full screen refreshes on that scene
+	bool fullRefresh = _vm->getEngine()->getCurrentLocation() == 98;
+
 	if (rcBoundEllipse != NULL) {
 		// Circular wipe effect
 		getNewFrameWipe(lpBuf, *rcBoundEllipse);
 		_wiping = true;
-	} else if (_wiping) {
+	} else if (_wiping || fullRefresh) {
 		// Just finished a wiping effect, so copy the full screen
 		copyRectToScreen(lpBuf, RM_SX * 2, 0, 0, RM_SX, RM_SY);
 		_wiping = false;