gps: Removed redundant word and removeLinePoints function returns true/false (#523)

* Added description and new export functions

* Check whether parameters can be converted to numbers and convert them

* Check whether parameters can be converted to numbers and convert them

* Added spacing in the text in some places

* Fixed warning that posX and posY was defined before

* Fixed spacing

* Few text improvements in meta.xml

* removeLinePoints function returns true/false

* Removed redundant word

* Adjusted description removeLinePoints function

* Fixed that when addLinePoint was called multiple times without deleting the previous points at different paths, not all drawn lines of the client HUD mini map were removed

* Increased version

---------

Co-authored-by: Dutchman101 <12105539+Dutchman101@users.noreply.github.com>

Author: T-MaxWiese-T

[gameplay]/gps/linedrawer.lua

@@ -10,10 +10,14 @@ local linePoints  = { }
 local renderStuff = { }
 
 function removeLinePoints ( )
+	if not next(linePoints) then
+		return false
+	end
 	linePoints = { }
 	for name, data in pairs ( renderStuff ) do
 		unloadTile ( name )
 	end
+	return true
 end
 
 function addLinePoint ( posX, posY )

[gameplay]/gps/meta.xml

@@ -1,5 +1,5 @@
 <meta>
-	<info author="arc_" type="script" version="1.1.0" description="Calculates and displays the quickest road path between two points/nodes on the map. Commands: /path node1 node2 /path2 x y [z]. Resource contains export functions for custom logic."/>
+	<info author="arc_" type="script" version="1.1.1" description="Calculates and displays the quickest road path between two points/nodes on the map. Commands: /path node1 node2 /path2 x y [z]. Resource contains export functions for custom logic."/>
 
 	<script src="util.lua" type="client"/>
 	<script src="client.lua" type="client"/>
@@ -22,9 +22,9 @@
 	Function returns true if successful otherwise false.
 	Draws the path on the client HUD mini map in ascending order. For example, if you use the table returned by the calculatePathByCoords
 	or calculatePathByNodeIDs function. 
-	If you add your own line points points they must be very close to each other, otherwise the path will not be drawn properly.-->
+	If you add your own line points they must be very close to each other, otherwise the path will not be drawn properly.-->
 	<export function="removeLinePoints" type="client"/> <!--removeLinePoints()
-	Function returns nil.
+	Function returns true if the drawn lines of the client HUD mini map were removed otherwise false if there was nothing to remove.
 	Removes the line points of the addLinePoint function respectively the drawn lines of the client HUD mini map. 
 	This can be used, for example, when the target node point has been reached or a player gets out of the vehicle.-->
 </meta>