PEGASUS: Fix moving forward

You know, actually initialize some variables :P

engines/pegasus/neighborhood/door.h

@@ -59,8 +59,16 @@ class DoorTable {
 	void clear();
 
 	struct Entry {
-		Entry() { movieStart = 0xffffffff; }
+		Entry() { clear(); }
 		bool isEmpty() { return movieStart == 0xffffffff; }
+		void clear() {
+			room = kNoRoomID;
+			direction = kNoDirection;
+			altCode = kNoAlternateID;
+			movieStart = 0xffffffff;
+			movieEnd = 0xffffffff;
+			flags = kNoDoorFlags;
+		}
 
 		tRoomID room;
 		tDirectionConstant direction;