[meld] setup_win32: Fix the setup shebang, even if it's unused

[Kai Willadsen <kaiw src gnome org>]

commit e2be72124307b8f6bdb19ca93769c7652b6a4547
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Aug 27 06:58:39 2017 +1000

    setup_win32: Fix the setup shebang, even if it's unused

 setup_win32.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/setup_win32.py b/setup_win32.py
index c3dc9a5..44dc859 100644
--- a/setup_win32.py
+++ b/setup_win32.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import glob
 import os