Warning fix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34660 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/src/fl/dyntbar.cpp

@@ -187,6 +187,8 @@ wxToolBarToolBase*
 
 #if wxUSE_TOOLTIPS
     pBmpBtn->SetToolTip( helpString1 );
+#else
+    wxUnusedVar( helpString1 );
 #endif  // wxUSE_TOOLTIPS
 
     AddTool( toolIndex, pBmpBtn );