====== updateLine ======

  * Parameters & Types:
    * shapeid:number
     * sx:number
    * sz:number
     * ex:number
     * ez:number
  * Return value and type:
  * ErrorCode. OK
  * The main purpose of this method is to update the shape (linear) and pass in the start and end coordinates
  * Specific use cases are as follows:

<code>
--Set the shape with id 1 (can only be a straight line) from (0,0) to (1,1)
--The first parameter 1 is the straight line shape id
--The second and third parameters 0,0 are the straight line start coordinates
--The last two parameters 1,1 are the straight line end coordinates
MapMark:updateLine(1,0,0,1,1)
--Display in the chat box
Chat:sendSystemMsg("The straight line with id 1 is set from (0,0) to (1,1)")
</code>