Don't use gtk_widget_get_scale_factor on old GTK3 versions

* src/gtkutil.c (xg_get_scale): gtk_widget_get_scale_factor is
only present since GTK 3.10.

diff --git a/src/gtkutil.c b/src/gtkutil.c
index 03319726f09042c02496d67e548f526b6bb04fdc..0c8395efe9ba7adad242e6ccf8d16fc069778f78 100644 (file)
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -223,7 +223,7 @@ xg_get_gdk_scale (void)
 int
 xg_get_scale (struct frame *f)
 {
-#ifdef HAVE_GTK3
+#if GTK_CHECK_VERSION (3, 10, 0)
   if (FRAME_GTK_WIDGET (f))
     return gtk_widget_get_scale_factor (FRAME_GTK_WIDGET (f));
 #endif