6.02.00079 Towed implement wide turn fix

Wide turn courses ended beyond the start of the next row so
towed implements did not have a chance to align with the row.

Changed wide turns to end before the tractor reaches the
next row.

Fixes #6330, was introduced by the improvement for #6034.

modDesc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" standalone="no" ?>
 <modDesc descVersion="47">
-	<version>6.02.00078</version>
+	<version>6.02.00079</version>
 	<author><![CDATA[Courseplay.devTeam]]></author>
 	<title><!-- en=English de=German fr=French es=Spanish ru=Russian pl=Polish it=Italian br=Brazilian-Portuguese cs=Chinese(Simplified) ct=Chinese(Traditional) cz=Czech nl=Netherlands hu=Hungary jp=Japanese kr=Korean pt=Portuguese ro=Romanian tr=Turkish -->
 		<en>CoursePlay SIX</en>

turn.lua

@@ -2259,7 +2259,11 @@ function TurnContext:getTurnEndNodeAndOffsets()
 		-- on the work start node so by the time the implement reaches it, it is also aligned
 		turnEndNode = self.workStartNode
 		startOffset = 0
-		goalOffset = self.turnEndForwardOffset
+		-- vehicle is about frontMarkerDistance before the work end when finishing the turn, giving enough time
+		-- for the implement to align
+		-- TODO: this isn't exact science here, as the distance we need to straighten out the implement is rather
+		-- a function of the radius, the starting angle and probably the towbar length.
+		goalOffset = - self.turnEndForwardOffset
 	end
 	return turnEndNode, startOffset, goalOffset
 end