Initialize checknames field in dns_view_create()

The 'checknames' field wasn't initialized in dns_view_create(), but it
should otherwise AddressSanitizer identifies the following runtime error
in query_test.c.

    runtime error: load of value 190, which is not a valid value for type '_Bool'

lib/dns/view.c

@@ -190,6 +190,7 @@ dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass, const char *name,
 	view->transfer_format = dns_one_answer;
 	view->cacheacl = NULL;
 	view->cacheonacl = NULL;
+	view->checknames = false;
 	view->queryacl = NULL;
 	view->queryonacl = NULL;
 	view->recursionacl = NULL;