Cleanup: Metal: Avoid MSL warning in curves interpolation shader

source/blender/draw/intern/shaders/draw_curves_interpolation_comp.glsl

@@ -262,7 +262,8 @@ void evaluate_curve(const IndexRange points,
   const uint curve_resolution = curves_resolution_buf[curve_index];
   const bool is_curve_cyclic = curve_cyclic_get(curve_index);
 
-  for (uint i = 0; i < evaluated_points.size(); i++) {
+  const uint evaluated_points_count = uint(evaluated_points.size());
+  for (uint i = 0; i < evaluated_points_count; i++) {
     const int evaluated_point_id = evaluated_points.start() + int(i);
     const uint point_id = i / curve_resolution;
     const float parameter = float(i % curve_resolution) / float(curve_resolution);