ODB++: don't overrun the bezier point list

This produced a spurious point (at best, a crash at worst)
when exporting bezier curves.

Relates-To: https://gitlab.com/kicad/code/kicad/-/issues/18706

pcbnew/pcb_io/odbpp/odb_feature.cpp

@@ -185,7 +185,7 @@ void FEATURES_MANAGER::AddShape( const PCB_SHAPE& aShape, PCB_LAYER_ID aLayer )
     {
         const std::vector<VECTOR2I>& points = aShape.GetBezierPoints();
 
-        for( size_t i = 0; i < points.size(); i++ )
+        for( size_t i = 0; i < points.size() - 1; i++ )
         {
             AddFeatureLine( points[i], points[i + 1], aShape.GetStroke().GetWidth() );
         }