patch 8.2.4232: some compilers don't like a goto label without statement

Problem:    Some compilers don't like a goto label without statement.
Solution:   Return instead of using a goto.
diff --git a/src/list.c b/src/list.c
index a8b2207..f4fddbd 100644
--- a/src/list.c
+++ b/src/list.c
@@ -2487,7 +2487,7 @@
     {
 	semsg(_(e_argument_of_str_must_be_list_string_dictionary_or_blob),
 								    func_name);
-	goto theend;
+	return;
     }
 
     // On type errors, the preceding call has already displayed an error
@@ -2524,8 +2524,6 @@
 
 	did_emsg |= save_did_emsg;
     }
-
-theend:
 }
 
 /*