added in some additional assertion checks

src/actions.cpp

@@ -835,6 +835,8 @@ size_t move_unit(display* disp, const gamemap& map,
 		steps.pop_back();
 	}
 
+	assert(steps.size() <= route.size());
+
 	//if we can't get all the way there and have to set a go-to
 	if(steps.size() != route.size()) {
 		ui->second.set_goto(route.back());
@@ -884,6 +886,8 @@ size_t move_unit(display* disp, const gamemap& map,
 		disp->draw();
 	}
 
+	assert(steps.size() <= route.size());
+
 	return steps.size();
 }
 

src/playturn.cpp

@@ -443,12 +443,14 @@ void turn_info::left_click(const SDL_MouseButtonEvent& event)
 
 	//otherwise we're trying to move to a hex
 	else if(!browse_ && selected_hex_.valid() && selected_hex_ != hex &&
-		     units_.count(selected_hex_) &&
+		     units_.count(selected_hex_) && !enemy_paths_ &&
 		     enemy == units_.end() && !current_route_.steps.empty() &&
 		     current_route_.steps.front() == selected_hex_) {
 
 		const size_t moves = move_unit(&gui_,map_,units_,teams_,
 		                   current_route_.steps,&recorder,&undo_stack_);
+		if(moves == 0)
+			return;
 
 		redo_stack_.clear();