Ensure patch is initialized to zero, otherwise, the allocated flag may be set
diff --git a/src/diff_patch.c b/src/diff_patch.c
index 38d5f42..4e0672a 100644
--- a/src/diff_patch.c
+++ b/src/diff_patch.c
@@ -274,6 +274,7 @@ int git_diff_foreach(
return error;
memset(&xo, 0, sizeof(xo));
+ memset(&patch, 0, sizeof(patch));
diff_output_init(
&xo.output, &diff->opts, file_cb, hunk_cb, data_cb, payload);
git_xdiff_init(&xo, &diff->opts);