Complete first release candidate audit (#107)

tools/codegen/src/xml_catalog.rs

@@ -860,6 +860,7 @@ fn render_visual_catalog(catalog: &VisualCatalog) -> String {
              pub fn params() -> libremetaverse_types::compat::SortedList<i32, VisualParam> { libremetaverse_types::compat::SortedList(generated_params().clone()) }\n\
              pub fn find(name: String, wearable: Option<String>) -> Result<VisualParam, crate::Error> { Ok(generated_params().values().find(|param| param.name == name && param.wearable == wearable).cloned().unwrap_or_default()) }\n\
          }\n\n\
+         pub(crate) fn param_by_id(id: i32) -> Option<&'static VisualParam> { generated_params().get(&id) }\n\n\
          pub(crate) fn decode_visual_params(bytes: &[u8]) -> HashMap<i32, f32> {\n\
              let params = generated_params();\n\
              let mut result = HashMap::with_capacity(GROUP0_PARAM_IDS.len());\n\
@@ -881,6 +882,7 @@ fn render_visual_catalog(catalog: &VisualCatalog) -> String {
     body.push_str(
         "pub(crate) fn new_avatar() -> Result<crate::Avatar, crate::Error> {\n\
              Ok(crate::Avatar {\n\
+                 base: crate::Primitive::new_with_constructor()?,\n\
                  animations: Vec::new(), appearance_flags: crate::AppearanceFlags::NONE, appearance_version: 0,\n\
                  attachments: Vec::new(), cof_version: 0, control_flags: crate::AgentManagerControlFlags(0),\n\
                  groups: Vec::new(), hover_height: libremetaverse_types::Vector3::zero(),\n\