patch 9.1.0270: a few minor issues to fix

The following is a collection of some small fixes:

- Problem:  Vim9: funcref pointer pt leaks, when function is not found
  Solution: Free funcref pointer in case of error (fixes: #14254)

- Problem:  memory leak of crypt state pointer allocation fails
  Solution: free crypt state pointer properly (fixes: #14253)

- Problem:  Vim9: Leaking memory when compiling dict fails
  Solution: Free the memory in case of error (fixes: #14252)

- Problem:  Coverity complains about derefencing obj_members pointer
            (after v9.1.0261)
  Solution: Verify that obj_members ptr is non-null before accessing it

  References: https://scan5.scan.coverity.com/#/project-view/41242/10101?selectedIssue=1596133

closes: #14412

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 053f617..2d128e0 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -4573,6 +4573,7 @@
 		    {
 			SOURCING_LNUM = iptr->isn_lnum;
 			iemsg("ufunc unexpectedly NULL for FUNCREF");
+			vim_free(pt);
 			goto theend;
 		    }
 		    if (fill_partial_and_closure(pt, ufunc,