Fixed a rare bug when mstime == next.arrive and next.arrive == next.setoff which causes a divide by zero in movement splines.
Fixed a rare bug when mstime == next.arrive and next.arrive == next.setoff which causes a divide by zero in movement splines.

sysuzhang/arcemu,lbfamous/arcemu,arcemu-ng/arcemu,dberga/arcbliz,arcemu-ng/arcemu,lbfamous/arcemu,JoMiro/arcemu,arcemu/arcemu,lbfamous/arcemu,arcemu-ng/arcemu,lbfamous/arcemu,JoMiro/arcemu,arcemu/arcemu,dberga/arcbliz,JoMiro/arcemu,sysuzhang/arcemu,dberga/arcbliz,sysuzhang/arcemu,arcemu-ng/arcemu,arcemu/arcemu,JoMiro/arcemu,sysuzhang/arcemu,arcemu-ng/arcemu,arcemu/arcemu,arcemu/arcemu,sysuzhang/arcemu,arcemu/arcemu,lbfamous/arcemu,lbfamous/arcemu,dberga/arcbliz,JoMiro/arcemu,arcemu-ng/arcemu,JoMiro/arcemu,dberga/arcbliz,sysuzhang/arcemu