patch 9.1.0341: Problem: a few memory leaks are found

Problem:  a few memory leaks are found
          (LuMingYinDetect )
Solution: properly free the memory

Fixes the following problems:
- Memory leak in f_maplist()
  fixes: #14486

- Memory leak in option.c
  fixes: #14485

- Memory leak in f_resolve()
  fixes: #14484

- Memory leak in f_autocmd_get()
  related: #14474

- Memory leak in dict_extend_func()
  fixes: #14477
  fixes: #14238

closes: #14517

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/map.c b/src/map.c
index b7bb46c..c416c0a 100644
--- a/src/map.c
+++ b/src/map.c
@@ -2574,7 +2574,10 @@
 		if ((d = dict_alloc()) == NULL)
 		    return;
 		if (list_append_dict(rettv->vval.v_list, d) == FAIL)
+		{
+		    dict_unref(d);
 		    return;
+		}
 
 		keys_buf = NULL;
 		did_simplify = FALSE;