[gimp] gui_sanity_check(): bump GTK+ dependency here too

[Michael Natterer <mitch src gnome org>]

commit c58eee02299cb8ee6c639e18728cfbc477f98d3f
Author: Michael Natterer <mitch gimp org>
Date:   Sat Oct 17 17:49:28 2009 +0200

    gui_sanity_check(): bump GTK+ dependency here too

 app/gui/gui.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/gui/gui.c b/app/gui/gui.c
index 7789664..7c08ad0 100644
--- a/app/gui/gui.c
+++ b/app/gui/gui.c
@@ -258,8 +258,8 @@ static gchar *
 gui_sanity_check (void)
 {
 #define GTK_REQUIRED_MAJOR 2
-#define GTK_REQUIRED_MINOR 16
-#define GTK_REQUIRED_MICRO 6
+#define GTK_REQUIRED_MINOR 18
+#define GTK_REQUIRED_MICRO 1
 
   const gchar *mismatch = gtk_check_version (GTK_REQUIRED_MAJOR,
                                              GTK_REQUIRED_MINOR,