wxMotif compilation fix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15936 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/wincmn.cpp

@@ -364,6 +364,8 @@ void wxWindowBase::Centre(int direction)
             }
         }
 
+        // there is no wxTopLevelWindow under wxMotif yet
+#ifndef __WXMOTIF__
         // we shouldn't center the dialog on the iconized window: under
         // Windows, for example, this places it completely off the screen
         if ( parent )
@@ -374,6 +376,7 @@ void wxWindowBase::Centre(int direction)
                 parent = NULL;
             }
         }
+#endif // __WXMOTIF__
 
         // did we find the parent?
         if ( !parent )