Geometry Nodes: fallback to point domain in viewer instead of corners

For people it's usually unexpected that the node uses the corner domain because
one thinks about the points in most cases.

source/blender/nodes/intern/geometry_nodes_lazy_function.cc

@@ -569,8 +569,7 @@ class LazyFunctionForViewerNode : public LazyFunction {
                   used_domain = *detected_domain;
                 }
                 else {
-                  used_domain = type == GEO_COMPONENT_TYPE_MESH ? ATTR_DOMAIN_CORNER :
-                                                                  ATTR_DOMAIN_POINT;
+                  used_domain = ATTR_DOMAIN_POINT;
                 }
               }
               bke::try_capture_field_on_geometry(