Fixes for Oracle 19c: invalid cast to integer

This fixes the following bug for Oracle:
:    invalid positional variable `:', valid values start with 1
:        while executing
:    "ns_ora 0or1row nsdb0 {
:                select acs_permission.permission_p(:object_id, :party_id, :privilege)::integer from dual
:            }"

packages/acs-tcl/tcl/acs-permissions-procs.tcl

@@ -162,7 +162,7 @@ ad_proc -private permission::permission_p_not_cached {
     # We have a per-request cache here
     return [acs::per_request_cache eval -key acs-tcl.permission_p__cache-$party_id,$object_id,$privilege {
         db_string select_permission_p {
-            select acs_permission.permission_p(:object_id, :party_id, :privilege)::integer from dual
+            select acs_permission.permission_p(:object_id, :party_id, :privilege) from dual
         }
     }]
 }