[gtksourceview/wip/chergert/gsv-gtk4: 130/175] testsuite: remove deprecated gtk_main API usage

[Christian Hergert <chergert src gnome org>]

commit 15db4e8205992ffe1f8f1bb86f631b98244c1dc4
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 16 15:23:29 2020 -0700

    testsuite: remove deprecated gtk_main API usage

 testsuite/test-buffer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/testsuite/test-buffer.c b/testsuite/test-buffer.c
index fa3fe017..44bce205 100644
--- a/testsuite/test-buffer.c
+++ b/testsuite/test-buffer.c
@@ -33,9 +33,9 @@ static const char *c_snippet =
 static void
 flush_queue (void)
 {
-       while (gtk_events_pending ())
+       while (g_main_context_pending (NULL))
        {
-               gtk_main_iteration ();
+               g_main_context_iteration (NULL, FALSE);
        }
 }