Check hasOwnProperty after conversion to string

I thought I could be clever and micro-optimize this a bit, but
`has_own_property` really does require a string argument, so we have to
do the conversion first.

crates/neon-runtime/src/napi/object.rs

@@ -32,7 +32,7 @@ pub unsafe extern "C" fn get_own_property_names(out: &mut Local, env: Env, objec
     }
 
     let raw_names = raw_names.assume_init();
-    let mut fixed_names = fixed_names.assume_init();
+    let fixed_names = fixed_names.assume_init();
 
     *out = fixed_names;
 
@@ -47,17 +47,6 @@ pub unsafe extern "C" fn get_own_property_names(out: &mut Local, env: Env, objec
             continue;
         }
 
-        let mut is_own_property = false;
-        // May return a non-OK status if `key` is not a string or a Symbol, but here it is always
-        // a string.
-        if napi::napi_has_own_property(env, object, property_name, &mut is_own_property as *mut _) != napi::napi_status::napi_ok {
-            return false;
-        }
-
-        if !is_own_property {
-            continue;
-        }
-
         // Before https://github.com/nodejs/node/pull/27524, `napi_get_property_names` would return
         // numbers for numeric indices instead of strings.
         // Make sure we always return strings.
@@ -72,6 +61,17 @@ pub unsafe extern "C" fn get_own_property_names(out: &mut Local, env: Env, objec
             property_name
         };
 
+        let mut is_own_property = false;
+        // May return a non-OK status if `key` is not a string or a Symbol, but here it is always
+        // a string.
+        if napi::napi_has_own_property(env, object, property_name, &mut is_own_property as *mut _) != napi::napi_status::napi_ok {
+            return false;
+        }
+
+        if !is_own_property {
+            continue;
+        }
+
         let mut dummy = false;
         // If we can't convert assign to this array, something went wrong.
         if !set_index(&mut dummy, env, fixed_names, fixed_len, property_name) {

test/napi/lib/hello.js

@@ -25,6 +25,6 @@ describe('hello', function() {
       0: 1,
       a: 1,
       whatever: true
-    })
+    });
   });
 });