[meld] setup_win32: Get site-packages in a slightly less silly way

[Kai Willadsen <kaiw src gnome org>]

commit e5c572dafc4f27c49c94c2cda3f230fe6f4f09b9
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Apr 29 06:40:30 2018 +1000

    setup_win32: Get site-packages in a slightly less silly way
    
    This was breaking on msys2 builds, because it only has one entry in
    site-packages.

 setup_win32.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/setup_win32.py b/setup_win32.py
index b1679ab0..aa89b081 100644
--- a/setup_win32.py
+++ b/setup_win32.py
@@ -9,7 +9,7 @@ from cx_Freeze import setup, Executable
 import meld.build_helpers
 import meld.conf
 
-site_dir = site.getsitepackages()[1]
+site_dir = [f for f in site.getsitepackages() if 'site-packages' in f][0]
 include_dll_path = os.path.join(site_dir, "gnome")
 
 missing_dll = [