[orca] Add another voice sanity check

[Joanmarie Diggs <joanied src gnome org>]

commit 881eb56db250c463930366d7a8fa98b629bbd476
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Jul 19 14:44:30 2016 -0400

    Add another voice sanity check

 src/orca/acss.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/acss.py b/src/orca/acss.py
index 5cb1838..8449baa 100644
--- a/src/orca/acss.py
+++ b/src/orca/acss.py
@@ -106,3 +106,10 @@ class ACSS(dict):
     def getDialect(self):
         family = self.get(ACSS.FAMILY, {})
         return family.get('dialect')
+
+    def update(self, newDict):
+        family = newDict.get(ACSS.FAMILY)
+        if isinstance(family, dict) and family.get('name') is None:
+            newDict.pop(ACSS.FAMILY)
+
+        return super().update(newDict)