Enable Unicode input methods via GTK's and XIM

under GTK 2.0.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17660 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -1356,8 +1356,11 @@ static void gtk_wxwindow_commit_cb (GtkIMContext *context,
     wxKeyEvent event( wxEVT_KEY_DOWN );
     
     // I wonder how well keyval represents a Unicode char
-    gunichar ch = g_utf8_get_char( str );
-    event.m_keyCode = ch;
+    event.m_uniChar = g_utf8_get_char( str );
+    
+    // Backward compatible for ISO-8859
+    if (event.m_uniChar < 256)
+        event.m_keyCode = event.m_uniChar;
     
     if (!ret)
     {