undid the last change: it results in crashes with some GTK+ versions

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@21202 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/timer.cpp

@@ -41,12 +41,7 @@ extern "C" gint timeout_callback( gpointer data )
     gdk_threads_leave();
 
     if ( timer->IsOneShot() )
-    {
-        // This sets m_tag to -1
-        timer->Stop();
-        
         return FALSE;
-    }
 
     return TRUE;
 }

src/gtk1/timer.cpp

@@ -41,12 +41,7 @@ extern "C" gint timeout_callback( gpointer data )
     gdk_threads_leave();
 
     if ( timer->IsOneShot() )
-    {
-        // This sets m_tag to -1
-        timer->Stop();
-        
         return FALSE;
-    }
 
     return TRUE;
 }