CAM: Don't try and track ghosts when watching qtv/mvd

Example given by praxismo: if tracking one player and pressing jump
  to watch the next, if the next player is a ghost, the camera gets
  'stuck'.  Now it skips over the ghost and moves on to the next
  connected player.
Should probably skip them on standard spec slots too, but it survives
  because mvdsv returns "invalid client to track"... there are other
  issues with that and client numbers changing, so leaving for another
  day.

cl_cam.c

@@ -588,16 +588,17 @@ void Cam_FinishMove(usercmd_t *cmd)
 	i = end;
 	do {
 		s = &cl.players[i];
-		if (s->name[0] && !s->spectator) {
-			if (cls.mvdplayback && cl.teamfortress) 
+		if (s->name[0] && !s->spectator && (!cls.mvdplayback || cl.frames[cl.parsecount & UPDATE_MASK].playerstate[i].messagenum == cl.parsecount)) {
+			if (cls.mvdplayback && cl.teamfortress) {
 				V_TF_ClearGrenadeEffects(); // BorisU
+			}
 			Cam_Lock(i);
 			ideal_track = i;    
 			return;
 		}
 		i = (i + MAX_CLIENTS + inc) % MAX_CLIENTS;
 	} while (i != end);
-	// stay on same guy?	
+	// stay on same guy?
 
 	i = ideal_track;	
 	s = &cl.players[i];