[gthumb] use g_object_unref instead of gdk_cursor_unref

[Paolo Bacchilega <paobac src gnome org>]

commit 6bdaf86807b9406a8dd766dd259dbc0c96b8a1e5
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Mar 8 12:20:53 2020 +0100

    use g_object_unref instead of gdk_cursor_unref

 gthumb/gth-browser.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gthumb/gth-browser.c b/gthumb/gth-browser.c
index e62002a7..69f9b599 100644
--- a/gthumb/gth-browser.c
+++ b/gthumb/gth-browser.c
@@ -1076,7 +1076,7 @@ _gth_browser_update_activity (GthBrowser *browser,
                if (browser->priv->activity_ref == 1) {
                        GdkCursor  *cursor = gdk_cursor_new_from_name (gtk_widget_get_display (GTK_WIDGET 
(browser)), "progress");
                        gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (browser)), cursor);
-                       gdk_cursor_unref (cursor);
+                       g_object_unref (cursor);
                }
        }
        else {
@@ -1084,7 +1084,7 @@ _gth_browser_update_activity (GthBrowser *browser,
                if (browser->priv->activity_ref == 0) {
                        GdkCursor *cursor = gdk_cursor_new_from_name (gtk_widget_get_display (GTK_WIDGET 
(browser)), "default");
                        gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (browser)), cursor);
-                       gdk_cursor_unref (cursor);
+                       g_object_unref (cursor);
                }
        }
 }