git-am.sh: use the $(...) construct for command substitution

diff --git a/cache-tree.c b/cache-tree.c
index 587b35362f18b3e98cd9e201a2de37c1878e852b..7fa524a11323621d24c352b0a1108ae953a60cf5 100644 (file)
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -117,11 +117,11 @@ void cache_tree_invalidate_path(struct cache_tree *it, const char *path)
 
        if (!it)
                return;
-       slash = strchr(path, '/');
+       slash = strchrnul(path, '/');
+       namelen = slash - path;
        it->entry_count = -1;
-       if (!slash) {
+       if (!*slash) {
                int pos;
-               namelen = strlen(path);
                pos = subtree_pos(it, path, namelen);
                if (0 <= pos) {
                        cache_tree_free(&it->down[pos]->cache_tree);
@@ -139,7 +139,6 @@ void cache_tree_invalidate_path(struct cache_tree *it, const char *path)
                }
                return;
        }
-       namelen = slash - path;
        down = find_subtree(it, path, namelen, 0);
        if (down)
                cache_tree_invalidate_path(down->cache_tree, slash + 1);