Change llist_add_* to take the address of the list rather than returning the new
head, and change all the callers.
diff --git a/archival/unzip.c b/archival/unzip.c
index 2cb256c..0b1e6f9 100644
--- a/archival/unzip.c
+++ b/archival/unzip.c
@@ -180,7 +180,7 @@
 
 		case 1: /* Include files */
 			if (opt == 1) {
-				zaccept = llist_add_to(zaccept, optarg);
+				llist_add_to(&zaccept, optarg);
 
 			} else if (opt == 'd') {
 				base_dir = optarg;
@@ -196,7 +196,7 @@
 
 		case 2 : /* Exclude files */
 			if (opt == 1) {
-				zreject = llist_add_to(zreject, optarg);
+				llist_add_to(&zreject, optarg);
 
 			} else if (opt == 'd') { /* Extract to base directory */
 				base_dir = optarg;