[evolution-exchange] Fix gtk3 configure option name.

[Matthew Barnes <mbarnes src gnome org>]

commit 0feee619c02b83a13e0e4eda84734733d5a80328
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Jun 29 13:51:13 2010 -0400

    Fix gtk3 configure option name.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 8674ae8..12e3a92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ m4_define([libsoup_minimum_version], [2.3.0])
 dnl **********************************
 dnl Gtk-3 compatibility
 dnl **********************************
-AC_ARG_ENABLE([gtk+-3],
+AC_ARG_ENABLE([gtk3],
 	AS_HELP_STRING([--enable-gtk3],
 	[Attempt to use gtk+-3]),
 	[enable_gtk3=$enableval],[enable_gtk3=no])