Fix compiler warnings about PolygonX constructors

[ferdnyc]

g++ 14.1.1 has a -Wtemplate-id-cdtor warning that complains constantly about the PolygonX constructors in geometry.h, which are incorrectly specified.

.../src/framework/draw/types/geometry.h:449:23: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  449 |     inline PolygonX<T>() = default;
      |                       ^
.../src/framework/draw/types/geometry.h:449:23: note: remove the ‘< >’
.../src/framework/draw/types/geometry.h:450:23: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  450 |     inline PolygonX<T>(const std::vector<PointX<T> >& v) : std::vector<PointX<T> >(v) {
      |                       ^
.../src/framework/draw/types/geometry.h:450:23: note: remove the ‘< >’
.../src/framework/draw/types/geometry.h:452:24: warning: template-id not allowed for constructor in C++20 [-Wtemplate-id-cdtor]
  452 |     inline PolygonX<T>(size_t size) : std::vector<PointX<T> >(size) {
      |                        ^~~~~~

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