patch 9.0.1136: memory leak when getting class member type from expr

Problem:    Memory leak when getting class member type from expr.
Solution:   Clear the expression result.

Author: brammool

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1136,
 /**/
     1135,
 /**/

src/vim9class.c

@@ -99,8 +99,11 @@ parse_member(
 	    int res = eval0(expr, &tv, eap, &evalarg);
 
 	    if (res == OK)
+	    {
 		type = typval2type(&tv, get_copyID(), type_list,
 						       TVTT_DO_MEMBER);
+		clear_tv(&tv);
+	    }
 	    if (type == NULL)
 	    {
 		semsg(_(e_cannot_get_object_member_type_from_initializer_str),