[bugfix] Initialize chunk_size with 0

Bug: T193386
Change-Id: I567c1090cd5d231e3f810d6d3cfa21863cf5cf97
---
M scripts/upload.py
1 file changed, 1 insertion(+), 0 deletions(-)

diff --git a/scripts/upload.py b/scripts/upload.py
index 2d40ba4..091457f 100755
--- a/scripts/upload.py
+++ b/scripts/upload.py
@@ -108,6 +108,7 @@
     verifyDescription = True
     aborts = set()
     ignorewarn = set()
+    chunk_size = 0
     chunk_size_regex = re.compile(
         r'^-chunked(?::(\d+(?:\.\d+)?)[ \t]*(k|ki|m|mi)?b?)?$', re.I)
     recursive = False
