Fix leak of gst promise with custom change func (#175)

Synchronize signatures of `GstPromiseAPI.gst_promise_new_with_change_func`
and `GstPromiseAPI.ptr_gst_promise_new_with_change_func` to C's version,
so that it would not get unknown `user_data` and `notify`, otherwise
we will get coredump in `gst_promise_free`.

Author: kezhuw

src/org/freedesktop/gstreamer/Promise.java

@@ -66,7 +66,7 @@ public Promise(final PROMISE_CHANGE listener) {
             public void callback(Promise promise, Pointer userData) {
                 listener.onChange(promise);
             }
-        }), false, false));
+        }, null, null)));
     }
 
     /**

src/org/freedesktop/gstreamer/lowlevel/GstPromiseAPI.java

@@ -60,8 +60,8 @@ protected List<String> getFieldOrder() {
   @CallerOwnsReturn Promise gst_promise_new();
   @CallerOwnsReturn Pointer ptr_gst_promise_new();
 
-  @CallerOwnsReturn Promise gst_promise_new_with_change_func(GstCallback callback);
-  @CallerOwnsReturn Pointer ptr_gst_promise_new_with_change_func(GstCallback callback);
+  @CallerOwnsReturn Promise gst_promise_new_with_change_func(GstCallback callback, Pointer userData, Pointer destroyNotify);
+  @CallerOwnsReturn Pointer ptr_gst_promise_new_with_change_func(GstCallback callback, Pointer userData, Pointer destroyNotify);
 
   PromiseResult gst_promise_wait(Promise promise);
 

test/org/freedesktop/gstreamer/PromiseTest.java

@@ -96,4 +96,28 @@ public void testReplyData() {
         Structure result = promise.getReply();
         assertTrue("result of promise does not match reply", result.isEqual(data));
     }
+
+    @Test
+    public void testDispose() {
+        if (!Gst.testVersion(1, 14)) {
+            return;
+        }
+        Promise promise = new Promise();
+        promise.interrupt();
+        promise.dispose();
+    }
+
+    @Test
+    public void testDisposeWithChangeFunc() {
+        if (!Gst.testVersion(1, 14)) {
+            return;
+        }
+        Promise promise = new Promise(new Promise.PROMISE_CHANGE() {
+            @Override
+            public void onChange(Promise promise) {
+            }
+        });
+        promise.interrupt();
+        promise.dispose();
+    }
 }