structure FEATURE support for ietf-yang-structure-ext

Only for the structure itself, no augment yet.
diff --git a/src/schema_compile_amend.c b/src/schema_compile_amend.c
index bab8ba3..66d2005 100644
--- a/src/schema_compile_amend.c
+++ b/src/schema_compile_amend.c
@@ -2222,7 +2222,7 @@
     struct ly_set mod_set = {0}, set = {0};
 
     mod_p = mod->parsed;
-    LYSC_CTX_INIT_PMOD(ctx, mod_p);
+    LYSC_CTX_INIT_PMOD(ctx, mod_p, NULL);
 
     LY_LIST_FOR(mod_p->augments, aug) {
         /* get target module */