CLEANUP: connection: Stop directly setting an ist's .ptr
Instead replace the complete `ist` by the value returned from `ist2`.
This was noticed during review of issue #549.
diff --git a/src/connection.c b/src/connection.c
index c1ec266..462dbf0 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -760,7 +760,7 @@
if (tlv.len > UNIQUEID_LEN)
goto bad_header;
- conn->proxy_unique_id.ptr = pool_alloc(pool_head_uniqueid);
+ conn->proxy_unique_id = ist2(pool_alloc(pool_head_uniqueid), 0);
if (!isttest(conn->proxy_unique_id))
goto fail;
if (istcpy(&conn->proxy_unique_id, tlv, UNIQUEID_LEN) < 0) {