Fix #126464: Subdiv optimal display edges causes broken wires on Metal

Caused by d1049f6082.
The old 255 FORCE_HIDE value converts to 1.0f as a float, not 255.0f.

source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_edge_fac.cc

@@ -69,7 +69,12 @@ static void extract_edge_factor_mesh(const MeshRenderData &mr, MutableSpan<T> vb
     for (const int corner : faces[face]) {
       const int edge = corner_edges[corner];
       if (!optimal_display_edges.is_empty() && !optimal_display_edges[edge]) {
-        vbo_data[corner] = FORCE_HIDE;
+        if constexpr (std::is_same_v<T, float>) {
+          vbo_data[corner] = 1.0f;
+        }
+        else {
+          vbo_data[corner] = FORCE_HIDE;
+        }
         continue;
       }