LPA-start Algorithm application (not finished)

Today, My plan is showing LPA-start algorithm applied to last map used at vector-field method. However, My code has problems such as infinite loop and FREE NODE LIST values are continuously changed:  RHS value (0) of start node is changed into 2.

(800,60) is start node. At this position, its RHS value must keep on zero. I promise to update complete version as soon as possible.