[libsigcplusplus: 150/151] Use 2.99.1 instead of 2.9.1

[Murray Cumming <murrayc src gnome org>]

commit 7f32038549bcd67672cac2282ff7710b55922678
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Mar 7 10:59:22 2016 +0100

    Use 2.99.1 instead of 2.9.1
    
    This gives us more room for 2.x releases of the libsigc++-2.0 API
    in future.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d47944f..c6cb2c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@
 ## You should have received a copy of the GNU Lesser General Public License
 ## along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_INIT([libsigc++], [2.9.1],
+AC_INIT([libsigc++], [2.99.1],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=libsigc%2B%2B],
         [libsigc++], [http://libsigc.sourceforge.net/])
 AC_PREREQ([2.59])