[eog] Add gtk version check around changes of commit 22618a75

[Felix Riemann <friemann src gnome org>]

commit b7c5c81df14c1cfe1644228758b1f894cf1253b1
Author: Felix Riemann <friemann gnome org>
Date:   Sun Mar 18 18:43:01 2012 +0100

    Add gtk version check around changes of commit 22618a75
    
    We use symbols that are not present in earlier GTK+ versions.

 src/eog-thumb-nav.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/eog-thumb-nav.c b/src/eog-thumb-nav.c
index 34645bd..ad541e4 100644
--- a/src/eog-thumb-nav.c
+++ b/src/eog-thumb-nav.c
@@ -84,6 +84,7 @@ eog_thumb_nav_scroll_event (GtkWidget *widget, GdkEventScroll *event, gpointer u
 	case GDK_SCROLL_RIGHT:
 		break;
 
+#if GTK_CHECK_VERSION (3, 3, 18)
 	case GDK_SCROLL_SMOOTH:
 	{
 		/* Compatibility code to catch smooth events from mousewheels */
@@ -100,7 +101,7 @@ eog_thumb_nav_scroll_event (GtkWidget *widget, GdkEventScroll *event, gpointer u
 		inc *= (gint) y_delta;
 	}
 	break;
-
+#endif
 	default:
 		g_assert_not_reached ();
 		return FALSE;