gtk: Change disable_portals() assertion to non-initialized

Fixes: #2074

Author: AbuShawarib

gtk4/Gir.toml

@@ -543,6 +543,9 @@ status = "generate"
     name = "accelerator_parse"
     manual = true # to make use of gdk::Key
     [[object.function]]
+    name = "disable_portals"
+    assertion = "not-initialized"
+    [[object.function]]
     name = "disable_setlocale"
     assertion = "not-initialized"
     [[object.function]]

gtk4/src/auto/functions.rs

@@ -39,7 +39,7 @@ pub fn check_version(
 #[cfg_attr(docsrs, doc(cfg(feature = "v4_18")))]
 #[doc(alias = "gtk_disable_portals")]
 pub fn disable_portals() {
-    assert_initialized_main_thread!();
+    assert_not_initialized!();
     unsafe {
         ffi::gtk_disable_portals();
     }