getenv/setenv: use constants if available

diff --git a/unpack-trees.h b/unpack-trees.h
index 191f7442f10683c8043288eece36f39166fedc95..fee7da43822b63e5b1f24444e5c51c43d3ff5760 100644 (file)
--- a/unpack-trees.h
+++ b/unpack-trees.h
@@ -16,6 +16,7 @@ struct unpack_trees_options {
        int verbose_update;
        int aggressive;
        const char *prefix;
+       int pos;
        struct dir_struct *dir;
        merge_fn_t fn;