patch 7.4.1096
Problem:    Need several lines to verify a command produces an error.
Solution:   Add assert_fails(). (suggested by Nikolay Pavlov)
            Make the quickfix alloc test actually work.
diff --git a/src/alloc.h b/src/alloc.h
index c237ef3..7a992c6 100644
--- a/src/alloc.h
+++ b/src/alloc.h
@@ -17,4 +17,5 @@
 	aid_qf_namebuf,
 	aid_qf_errmsg,
 	aid_qf_pattern,
+	aid_last,
 } alloc_id_T;