Don't initialize argv member of wxApp in unicode mode where it's no longer a primitive array.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50088 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/cocoa/app.mm

@@ -188,7 +188,9 @@ wxApp::wxApp()
 #endif // __WXDEBUG__
 
     argc = 0;
+#if !wxUSE_UNICODE
     argv = NULL;
+#endif
     m_cocoaApp = NULL;
     m_cocoaAppDelegate = NULL;
 }