fixes #3419

use directly the location of the agent to set the source of the path rather than the "supposed' location (to avoid rounding issue).

msi.gama.core/src/msi/gaml/skills/MovingSkill.java

@@ -1352,7 +1352,7 @@ private void moveToNextLocAlongPathSimplified(final IScope scope, final IAgent a
 		setCurrentEdge(agent, path);
 		setLocation(agent, currentLocation);
 		setHeading(agent, computedHeading);
-		path.setSource(currentLocation/* .copy(scope) */);
+		path.setSource(agent.getLocation()/* .copy(scope) */);
 
 	}