[gedit-plugins] build: check for python3

[Dominique Leuenberger <dleuen src gnome org>]

commit cefb99e3441613c6a73f4ea842c2d4fed8d68089
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Wed Jul 16 19:06:50 2014 +0200

    build: check for python3
    
    gedit enforces the use of python3 to be used for plugins. As such,
    it is useless for configure of gedit-plugins to accept python2.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 815c84e..c165416 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 
-AM_PATH_PYTHON
+AM_PATH_PYTHON(3)
 
 # Initialize libtool
 LT_PREREQ([2.2])