Default inventory_base_uri to dirname of script for Salt adapter

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/reclass/adapters/salt.py b/reclass/adapters/salt.py
index 5c6890a..705e576 100755
--- a/reclass/adapters/salt.py
+++ b/reclass/adapters/salt.py
@@ -52,7 +52,8 @@
 def cli():
     try:
         defaults = {'pretty_print' : True,
-                    'output' : 'yaml'
+                    'output' : 'yaml',
+                    'inventory_base_uri': os.path.dirname(sys.argv[0])
                    }
         defaults.update(find_and_read_configfile())
         options = get_options(RECLASS_NAME, VERSION, DESCRIPTION,