[gnumeric] Configure: be explicit that --without-gtk is broken.

[Morten Welinder <mortenw src gnome org>]

commit 1a58d23634c58d58dec12300ed55f0d13d0e76b1
Author: Morten Welinder <terra gnome org>
Date:   Fri Apr 1 19:38:01 2016 -0400

    Configure: be explicit that --without-gtk is broken.
    
    It's not even close to working.

 configure.ac                   |    1 +
 samples/complex-tests.gnumeric |  Bin 3123 -> 3708 bytes
 2 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f252cbc..cb09b70 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,7 @@ AC_ARG_WITH(gtk, AS_HELP_STRING([--without-gtk], [Build without UI]))
 if test "x$with_gtk" = xno; then
        ui_msg="None (Gtk disabled by request)"
        gnumeric_with_gtk=false
+       AC_MSG_ERROR([configuration without gtk+ currently does not work])
 else
        dnl We shouldn't silently default to --without-gtk.
        dnl If the requirements are not met, fail.
diff --git a/samples/complex-tests.gnumeric b/samples/complex-tests.gnumeric
index e03c956..be3ffe5 100644
Binary files a/samples/complex-tests.gnumeric and b/samples/complex-tests.gnumeric differ