patch 9.2.0268: memory leak in call_oc_method()

Problem:  memory leak in call_oc_method()
Solution: Clean up argvars in the failure case
          (Huihui Huang)

closes: #19828

Signed-off-by: Huihui Huang <625173@qq.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    268,
 /**/
     267,
 /**/

src/vim9class.c

@@ -3099,7 +3099,11 @@ call_oc_method(
     char_u *argp = name_end;
     int ret = get_func_arguments(&argp, evalarg, 0, argvars, &argcount, FALSE);
     if (ret == FAIL)
+    {
+	while (--argcount >= 0)
+	    clear_tv(&argvars[argcount]);
 	return FAIL;
+    }
 
     funcexe_T funcexe;
     CLEAR_FIELD(funcexe);