[gtk-doc] config: fix regression from last merge.

[Stefan Sauer <stefkost src gnome org>]

commit 3cbc5c8c267ba81a1664f6a83a0d9217ddec01da
Author: Stefan Sauer <ensonic users sf net>
Date:   Fri Aug 16 01:16:04 2019 +0200

    config: fix regression from last merge.
    
    Replace the '*' import with what we use and correctly reference the fields.
    Fixes #101

 gtkdoc/config.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gtkdoc/config.py b/gtkdoc/config.py
index 2d072fb..b0a407f 100644
--- a/gtkdoc/config.py
+++ b/gtkdoc/config.py
@@ -7,6 +7,7 @@ try:
 except ModuleNotFoundError:
     from gtkdoc.config_data import *
 
+
 def get_dirs(uninstalled):
     try:
         from gtkdoc_uninstalled import sourcedir
@@ -22,6 +23,6 @@ def get_dirs(uninstalled):
                     gtkdocdir = os.environ['ABS_TOP_SRCDIR']
             styledir = gtkdocdir + '/style'
         else:
-            gtkdocdir = os.path.join(config.datadir, 'gtk-doc/data')
+            gtkdocdir = os.path.join(datadir, 'gtk-doc/data')
             styledir = gtkdocdir
     return (gtkdocdir, styledir)