bump version to 0.6.1a

--HG--
branch : HEAD

configure.ac

diff --git a/configure.ac b/configure.ac
index 7223fb7..d60ed9e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.57)
-AC_INIT([libzip],[0.6.1],[nih@giga.or.at])
+AC_INIT([libzip],[0.6.1a],[nih@giga.or.at])
 AC_CONFIG_SRCDIR([lib/zip_add.c])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE