[gnome-terminal] build: Add note

[Christian Persch <chpe src gnome org>]

commit b543a966d5ffe7edde7929be29e06d332c080751
Author: Christian Persch <chpe gnome org>
Date:   Tue Feb 7 15:34:00 2012 +0100

    build: Add note

 configure.ac |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 407dc01..41ebc6a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 m4_define([gt_version_major],[3])
-m4_define([gt_version_minor],[3])
-m4_define([gt_version_micro],[0])
+m4_define([gt_version_minor],[2])
+m4_define([gt_version_micro],[99])
 m4_define([gt_version_extra],[])
 m4_define([gt_version],[gt_version_major().gt_version_minor().gt_version_micro()gt_version_extra])
 
@@ -10,6 +10,8 @@ AC_INIT([GNOME Terminal],[gt_version],[http://bugzilla.gnome.org/enter_bug.cgi?p
 AC_CONFIG_SRCDIR([src/terminal.c])
 AC_CONFIG_HEADERS([config.h])
 
+AC_MSG_ERROR([use the 'gnome-3-4' (for GNOME 3.3/3.4) or 'gnome-3-2' (stable, for GNOME 3.2) branch, not master])
+
 AM_INIT_AUTOMAKE([1.9 foreign no-dist-gzip dist-bzip2])
 
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])