[6.0] 5a448f21c fix typo

[Dridi Boukelmoune]

commit 5a448f21c22731407e2eecad9a537c6dda94916a
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Tue Nov 27 17:34:50 2018 +0100

    fix typo

diff --git a/lib/libvcc/vmodtool.py b/lib/libvcc/vmodtool.py
index e9fe75d73..72b1c5a6b 100755
--- a/lib/libvcc/vmodtool.py
+++ b/lib/libvcc/vmodtool.py
@@ -693,7 +693,7 @@ class s_synopsis(stanza):
             'auto': True,
             'manual': False,
         }
-        self.vcc.auto_synopsis = vald.get(self.toks[1])
+        self.vcc.auto_synopsis = valid.get(self.toks[1])
         if self.vcc.auto_synopsis is None:
             err("Valid Synopsis values are 'auto' or 'manual', got '%s'\n" %
                 self.toks[1])