hook: add a simple first example

diff --git a/branch.c b/branch.c
index a8a548ccf2870c99bbdbcdc7036003aa648faa0c..36541d05cd7b934bceba1af4fd4c121e51cd862b 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -25,8 +25,7 @@ static int find_tracked_branch(struct remote *remote, void *priv)
                } else {
                        free(tracking->spec.src);
                        if (tracking->src) {
-                               free(tracking->src);
-                               tracking->src = NULL;
+                               FREE_AND_NULL(tracking->src);
                        }
                }
                tracking->spec.src = NULL;