[gtk-mac-integration: 1/2] configure fixes

[John Ralls <jralls src gnome org>]

commit 44a995721c7acfcdf62b6217df2944e0e10f6875
Author: Tom Schoonjans <Tom Schoonjans bam de>
Date:   Tue May 12 09:27:42 2015 +0200

    configure fixes
    
    couple of brackets removed
    configure errors out when neither Gtk2 nor Gtk3 was found.

 configure.ac |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e191e99..481293a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,7 +51,7 @@ AS_IF([test "x$enable_menu_images" != xno],
       [AC_DEFINE([USE_MENU_IMAGES], 1, [Add images to menu items])])
 
 
-AC_ARG_WITH([gtk2], [AS_HELP_STRING([--with-gtk2]), [build against gtk2])] ,[with_gtk2=$withval],
+AC_ARG_WITH([gtk2], [AS_HELP_STRING([--with-gtk2], [build against gtk2])] ,[with_gtk2=$withval],
        [with_gtk2=yes])
 AC_ARG_WITH([gtk3], [AS_HELP_STRING([--with-gtk3], [build against gtk3])] ,[with_gtk3=$withval],
     [with_gtk3=yes])
@@ -60,14 +60,18 @@ if test "x$with_gtk3" = "xyes" ; then
     PKG_CHECK_MODULES([GTK3], [gtk+-3.0], [],
        with_gtk3=no
        AC_MSG_WARN([GTK+-3.0 not found])
-    ])
+    )
 fi
 
 if test "x$with_gtk2" = "xyes" ; then
     PKG_CHECK_MODULES([GTK2], [gtk+-2.0], [],
        with_gtk2=no
        AC_MSG_WARN([GTK+-2.0 not found])
-    ])
+    )
+fi
+
+if test "x$with_gtk2" = "xno" && test "x$with_gtk3" = "xno" ; then
+       AC_MSG_ERROR([Neither GTK+-2.0 nor GTK+-3.0 was found])
 fi
 
 AM_CONDITIONAL([INTROSPECTION], [test x$with_gtk3 = xyes])