regex: minor and probably unnecessary tweak

1 files changed, 2 insertions, 2 deletions

diff --git a/regex/__init__.py b/regex/__init__.py
index 3738251..d120de5 100644
--- a/regex/__init__.py
+++ b/regex/__init__.py
@@ -108,10 +108,10 @@ def make_pattern(tree, selected):
     elif label == 'BinOp' or label == 'Compare':
         # store the operator and left and/or right side
         children = []
-        if subpats[0]:
+        if subpats[0] is not None:
             children += [subpats[0]]
         children += [tree[1]]
-        if subpats[2]:
+        if subpats[2] is not None:
             children += [subpats[2]]
         pat = Tree(label, children)
     else: