xdiff: fix leak in hunk_consumer()
Spotted by ASAN.
Since PyList_Append() does not "steal" a reference, Py_DECREF() is always
required. Perhaps, this is the largest leak in this series.
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true
[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false