Add TObject2D/3D constructors

Author: jolting

modules/mrpt_math/include/mrpt/math/TObject2D.h

@@ -37,6 +37,7 @@ struct TObject2D
 
   variant_t data;
 
+  TObject2D(variant_t d) : data(std::move(d)) {}
   TObject2D() = default;
   ~TObject2D() = default;
 

modules/mrpt_math/include/mrpt/math/TObject3D.h

@@ -38,6 +38,7 @@ struct TObject3D
 
   variant_t data;
 
+  TObject3D(variant_t d) : data(std::move(d)) {}
   TObject3D() = default;
   ~TObject3D() = default;