fixup! [embind] Add register_type<T>(name, definition) to emit a stable TS alias

Author: mkl-ableton

src/lib/libsigs.js

@@ -307,6 +307,7 @@ sigs = {
   _embind_register_std_string__sig: 'vpp',
   _embind_register_std_wstring__sig: 'vppp',
   _embind_register_user_type__sig: 'vpp',
+  _embind_register_user_type_definition__sig: 'vppp',
   _embind_register_value_array__sig: 'vpppppp',
   _embind_register_value_array_element__sig: 'vppppppppp',
   _embind_register_value_object__sig: 'vpppppp',

test/code_size/test_codesize_hello_dylink_all.json

@@ -1,7 +1,7 @@
 {
   "a.out.js": 246044,
-  "a.out.nodebug.wasm": 597755,
-  "total": 843799,
+  "a.out.nodebug.wasm": 597767,
+  "total": 843811,
   "sent": [
     "IMG_Init",
     "IMG_Load",