SceneGraph: fix infinite recursion problems.

Spotted by MSVC. The virtual interface isn't used much anyway, so it
wasn't detected until now.

src/SceneGraph/DualComplexTransformation.h

@@ -129,7 +129,7 @@ template<class T> class BasicDualComplexTransformation: public AbstractBasicTran
         }
 
         void doRotate(Math::Rad<T> angle, TransformationType type) override final {
-            doRotate(angle, type);
+            rotate(angle, type);
         }
 
         /* No assertions fired, for internal use */

src/SceneGraph/MatrixTransformation2D.h

@@ -129,7 +129,7 @@ template<class T> class BasicMatrixTransformation2D: public AbstractBasicTransla
         }
 
         void doRotate(Math::Rad<T> angle, TransformationType type) override final {
-            doRotate(angle, type);
+            rotate(angle, type);
         }
 
         void doScale(const Math::Vector2<T>& vector, TransformationType type) override final {

src/SceneGraph/RigidMatrixTransformation2D.h

@@ -146,7 +146,7 @@ template<class T> class BasicRigidMatrixTransformation2D: public AbstractBasicTr
         }
 
         void doRotate(Math::Rad<T> angle, TransformationType type) override final {
-            doRotate(angle, type);
+            rotate(angle, type);
         }
 
         /* No assertions fired, for internal use */