[gthumb] bumped gtk requirement to 2.18.0 (for gtk_widget_get_allocation)

[Michael J. Chudobiak <mjc src gnome org>]

commit b9bfc637d663ed70556a997d66a3a33a57118189
Author: Michael J. Chudobiak <mjc avtechpulse com>
Date:   Thu Apr 15 09:19:35 2010 -0400

    bumped gtk requirement to 2.18.0 (for gtk_widget_get_allocation)

 README       |    2 +-
 configure.ac |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README b/README
index 8eb9fe0..3d84fb3 100644
--- a/README
+++ b/README
@@ -72,7 +72,7 @@ Compiling
   The following is the detailed list of libraries you need:
 
 	* glib	 		version >= 2.16.0
-	* gtk 			version >= 2.16.0
+	* gtk 			version >= 2.18.0
 	* gthread
  	* gmodule
 	* gio-unix
diff --git a/configure.ac b/configure.ac
index 6408c8e..f49edb6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ GNOME_COMPILE_WARNINGS([maximum])
 GNOME_CXX_WARNINGS
 
 GLIB_REQUIRED=2.16.0
-GTK_REQUIRED=2.16.0
+GTK_REQUIRED=2.18.0
 GCONF_REQUIRED=2.6.0
 EXIV2_REQUIRED=0.18
 CLUTTER_REQUIRED=1.0.0