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-rw-r--r--pyload/utils/__init__.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pyload/utils/__init__.py b/pyload/utils/__init__.py
index bc4e27df4..1655be857 100644
--- a/pyload/utils/__init__.py
+++ b/pyload/utils/__init__.py
@@ -197,7 +197,7 @@ def has_method(obj, name):
def accumulate(it, inv_map=None):
""" accumulate (key, value) data to {value : [keylist]} dictionary """
- if not inv_map:
+ if inv_map is None:
inv_map = {}
for key, value in it: