webservices: Allow structures to be passed by value in WsWriteType.

dlls/webservices/tests/writer.c

@@ -791,6 +791,21 @@ static void test_simple_struct_type(void)
     ok( hr == S_OK, "got %08x\n", hr );
     check_output( writer, "<struct>value</struct>", __LINE__ );
 
+    /* required value */
+    hr = set_output( writer );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = WsWriteStartElement( writer, NULL, &localname, &ns, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = WsWriteType( writer, WS_ELEMENT_CONTENT_TYPE_MAPPING, WS_STRUCT_TYPE, &s,
+                      WS_WRITE_REQUIRED_VALUE, test, sizeof(*test), NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = WsWriteEndElement( writer, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+    check_output( writer, "<struct>value</struct>", __LINE__ );
+
     hr = set_output( writer );
     ok( hr == S_OK, "got %08x\n", hr );
 

dlls/webservices/writer.c

@@ -1695,9 +1695,7 @@ static HRESULT write_type( struct writer *writer, WS_TYPE_MAPPING mapping, WS_TY
     case WS_STRUCT_TYPE:
     {
         const void *ptr;
-
-        if (!desc || option == WS_WRITE_REQUIRED_VALUE) return E_INVALIDARG;
-
+        if (!desc) return E_INVALIDARG;
         if (!option) option = WS_WRITE_REQUIRED_POINTER;
         if ((hr = get_value_ptr( option, value, size, (const void **)&ptr )) != S_OK) return hr;
         return write_type_struct( writer, mapping, desc, ptr );