Added wxExtDialog and sample.

Tried to make defs.h slightly more readable, also
    found some wrong flags then.
  Updated testconf.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2948 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/info.xpm

@@ -1,5 +1,5 @@
 /* XPM */
-static char *info[] = {
+static char *info_xpm[] = {
 /* columns rows colors chars-per-pixel */
 "48 48 478 2",
 "   c Gray0",