bump version to 4.3.0.0.alpha0+

Change-Id: If4b45ae0455806b6eee57e49d308127ab1207b98
diff --git a/configure.ac b/configure.ac
index 394b8cd4..fd47321 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ dnl in order to create a configure script.
# several non-alphanumeric characters, those are split off and used only for the
# ABOUTBOXPRODUCTVERSIONSUFFIX in openoffice.lst. Why that is necessary, no idea.

AC_INIT([LibreOffice],[4.2.0.0.alpha1+],[],[],[http://documentfoundation.org/])
AC_INIT([LibreOffice],[4.3.0.0.alpha0+],[],[],[http://documentfoundation.org/])

AC_PREREQ([2.59])