Bump minimum GTK for PGTK builds

* configure.ac: Require GTK 3.20 or later if building with PGTK.
It has already been required for some time now, but the
requirement was not reflected in the configure script.

* src/pgtkterm.c (pgtk_any_window_to_frame): Remove version
check.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index 566fc1f03d1..0bb41cb4463 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -5008,7 +5008,6 @@ pgtk_any_window_to_frame (GdkWindow * window)
 static gboolean
 pgtk_handle_event (GtkWidget *widget, GdkEvent *event, gpointer *data)
 {
-#if GTK_CHECK_VERSION (3, 18, 0)
   struct frame *f;
   union buffered_input_event inev;
   GtkWidget *frame_widget;
@@ -5045,7 +5044,6 @@ pgtk_handle_event (GtkWidget *widget, GdkEvent *event, gpointer *data)
 
       return TRUE;
     }
-#endif
   return FALSE;
 }