[sysadmin-bin] The sort method returns a NoneType, don't assign it to a variable

[Andrea Veri <averi src gnome org>]

commit 56839bea574cb9528789d4b53a83982e47bf7f63
Author: Andrea Veri <averi redhat com>
Date:   Wed May 30 10:58:28 2018 +0200

    The sort method returns a NoneType, don't assign it to a variable

 mail/set-topics-svn-commits-list | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/mail/set-topics-svn-commits-list b/mail/set-topics-svn-commits-list
index 81f4d8a..8005d5b 100755
--- a/mail/set-topics-svn-commits-list
+++ b/mail/set-topics-svn-commits-list
@@ -42,7 +42,8 @@ def get_gitlab_gnome_org_modules():
 
     return list(set(modules))
 
-modules = get_gitlab_gnome_org_modules().sort() 
+modules = get_gitlab_gnome_org_modules() 
+modules.sort()
 
 # Prepare topics variable
 topics = [(module, "^%s$" % re.escape(module), '', 0) for module in modules]