typo in mouse event handler

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26418 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/notebmac.cpp

@@ -581,7 +581,7 @@ void  wxNotebook::OnMouse( wxMouseEvent &event )
         int x = event.m_x ;
         int y = event.m_y ;
 
-#if TARGET_API_MAC_ISX
+#if TARGET_API_MAC_OSX
 		// OS Needs it in window not client coordinates
 		wxPoint origin = GetClientAreaOrigin() ;
 		x += origin.x ;