File fix-gtk-suppress.patch of Package uim_backports

--- ./gtk2/immodule/gtk-im-uim.orig.c	2018-05-12 06:33:26.000000000 +0900
+++ ./gtk2/immodule/gtk-im-uim.c	2020-07-26 06:52:03.396763730 +0900
@@ -1596,14 +1596,13 @@
 }
 
 static void
-im_uim_finalize(GObject *obj)
+im_uim_dispose(GObject *obj)
 {
   IMUIMContext *uic = IM_UIM_CONTEXT(obj);
 
-  im_uim_set_client_window(GTK_IM_CONTEXT(uic), NULL);
-
-  uic->next->prev = uic->prev;
-  uic->prev->next = uic->next;
+  if (uic->win) {
+    im_uim_set_client_window(GTK_IM_CONTEXT(uic), NULL);
+  }
 
   if (uic->cwin) {
 #if IM_UIM_USE_DELAY
@@ -1633,10 +1632,25 @@
     uic->preedit_window = NULL;
   }
 
+  if (uic->slave) {
+    g_signal_handlers_disconnect_by_func(uic->slave, (gpointer)(uintptr_t)commit_cb, uic);
+    g_object_unref(uic->slave);
+    uic->slave = NULL;
+  }
+
+  parent_class->dispose(obj);
+}
+
+static void
+im_uim_finalize(GObject *obj)
+{
+  IMUIMContext *uic = IM_UIM_CONTEXT(obj);
+
+  uic->next->prev = uic->prev;
+  uic->prev->next = uic->next;
+
   uim_release_context(uic->uc);
 
-  g_signal_handlers_disconnect_by_func(uic->slave, (gpointer)(uintptr_t)commit_cb, uic);
-  g_object_unref(uic->slave);
   parent_class->finalize(obj);
 
   if (uic == focused_context) {
@@ -1663,6 +1677,7 @@
   class->reset = im_uim_reset;
   class->set_use_preedit = im_uim_set_use_preedit;
 
+  object_class->dispose = im_uim_dispose;
   object_class->finalize = im_uim_finalize;
 }