Fixed wrong condition.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28636 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/splitter.cpp

@@ -200,7 +200,7 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
     // following the mouse movement while it drags the sash, without it we only
     // draw the sash at the new position but only resize the windows when the
     // dragging is finished
-#ifdef __WXMAC__ && TARGET_API_MAC_OSX == 1
+#if defined( __WXMAC__ ) && TARGET_API_MAC_OSX == 1
     bool isLive = true ;
 #else
     bool isLive = (GetWindowStyleFlag() & wxSP_LIVE_UPDATE) != 0;