Don't accumulate arguments in `Entry.GetTranslation`

Initialize `extradict` safely to avoid accumulating arguments in dict
objects passed in across calls.

Signed-off-by: Enji Cooper <yaneurabeya@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/event_rpcgen.py b/event_rpcgen.py
index 590b4eb4..8e9ed1fc 100755
--- a/event_rpcgen.py
+++ b/event_rpcgen.py
@@ -484,7 +484,9 @@ class Entry:
                 "around line %d" % (self._name, self.LineCount())
             )
 
-    def GetTranslation(self, extradict={}):
+    def GetTranslation(self, extradict=None):
+        if extradict is None:
+            extradict = {}
         mapping = {
             "parent_name": self._struct.Name(),
             "name": self._name,