Throw exception when human group size is 0

source/armarx/navigation/human/ConvexHullGenerator.cpp

@@ -17,6 +17,11 @@ namespace armarx::navigation::human
 
     shapes::Polygon ConvexHullGenerator::createShape(const HumanGroup &group)
     {
+        if (group.humans.size() == 0)
+        {
+            throw InvalidArgumentException("Human group size has to be at least 1");
+        }
+
         using BoostPoly = boost::geometry::model::polygon<Point>;
         using GroupPoly = shapes::Polygon;