xmllite: Also clear the attr pointer in reader_clear_attrs.

dlls/xmllite/reader.c

@@ -368,6 +368,7 @@ static void reader_clear_attrs(xmlreader *reader)
     }
     list_init(&reader->attrs);
     reader->attr_count = 0;
+    reader->attr = NULL;
 }
 
 /* attribute data holds pointers to buffer data, so buffer shrink is not possible

dlls/xmllite/tests/reader.c

@@ -838,7 +838,6 @@ todo_wine
     ok(count == 0, "expected 0, got %d\n", count);
 
     ret = IXmlReader_IsEmptyElement(reader);
-todo_wine
     ok(ret, "element should be empty\n");
 
     hr = IXmlReader_GetValue(reader, &val, NULL);