[virt-tools-list] [virt-viewer] build-sys: Use gtk+ 3.0 by default

[Christophe Fergeau]

virt-viewer currenty builds with gtk+ 2.0 by default. Nowadays, gtk+ 2.0 is
legacy, and this default is inconsistent with spice-gtk which defaults to
gtk+ 3.0. This commit switches the default to gtk+ 3.0
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index ed0fc91..bb0b591 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,12 +107,12 @@ AM_CONDITIONAL([HAVE_LIBVIRT], [test "x$have_libvirt" = "xyes"])
 
 AC_MSG_CHECKING([which gtk+ version to compile against])
 AC_ARG_WITH([gtk],
-  [AS_HELP_STRING([--with-gtk=2.0|3.0],[which gtk+ version to compile against (default: 2.0)])],
+  [AS_HELP_STRING([--with-gtk=2.0|3.0],[which gtk+ version to compile against (default: 3.0)])],
   [case "$with_gtk" in
      2.0|3.0) ;;
      *) AC_MSG_ERROR([invalid gtk version specified]) ;;
    esac],
-  [with_gtk=2.0])
+  [with_gtk=3.0])
 AC_MSG_RESULT([$with_gtk])
 
 case "$with_gtk" in
-- 
1.8.4.2