many: fix remaining check-pointer-deref issues

The updated parsing_hacks.h file uncovered a bunch of extra
things that the check-pointer-deref coccinelle script flags.

This commit fixes them to make the tree check-pointer-deref clean.

src/tmpfiles/offline-passwd.c

@@ -44,6 +44,8 @@ static int populate_uid_cache(const char *root, Hashmap **ret) {
         _cleanup_hashmap_free_ Hashmap *cache = NULL;
         int r;
 
+        assert(ret);
+
         cache = hashmap_new(&uid_gid_hash_ops);
         if (!cache)
                 return -ENOMEM;
@@ -85,6 +87,8 @@ static int populate_gid_cache(const char *root, Hashmap **ret) {
         _cleanup_hashmap_free_ Hashmap *cache = NULL;
         int r;
 
+        assert(ret);
+
         cache = hashmap_new(&uid_gid_hash_ops);
         if (!cache)
                 return -ENOMEM;

src/tmpfiles/tmpfiles.c

@@ -289,6 +289,7 @@ static int specifier_directory(
         unsigned i;
         int r;
 
+        assert(ret);
         assert_cc(ELEMENTSOF(paths_system) == ELEMENTSOF(paths_user));
         paths = arg_runtime_scope == RUNTIME_SCOPE_USER ? paths_user : paths_system;