Use even less nullptr for default flags

Change-Id: I5ec30de3e41dfc1c7bf6d5f5e36991eadcbbfb72
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/bineditor/bineditorplugin.cpp

@@ -148,7 +148,7 @@ public:
             } else {
                 result = NotFound;
                 m_contPos = -1;
-                m_widget->highlightSearchResults(QByteArray(), nullptr);
+                m_widget->highlightSearchResults(QByteArray(), {});
             }
         }
         return result;