Part: Geometry extensions set interface

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unique_ptr is a move only type. Therefore it may only take an rvalue.

It does not make sense a pass by value for move only types (Item 41).

src/Mod/Part/App/Geometry.cpp

@@ -288,7 +288,7 @@ const std::weak_ptr<GeometryExtension> Geometry::getExtension(Base::Type type) c
     throw Base::ValueError("No geometry extension of the requested type.");
 }
 
-void Geometry::setExtension(std::unique_ptr<GeometryExtension> geo)
+void Geometry::setExtension(std::unique_ptr<GeometryExtension> && geo)
 {
     bool hasext=false;