[libgda] Re-correction for bug #761424

[Vivien Malerba <vivien src gnome org>]

commit e72c59062f39e89569524f4556cbddb8d00119f4
Author: Vivien Malerba <malerba gnome-db org>
Date:   Sun Feb 7 20:49:07 2016 +0100

    Re-correction for bug #761424
    
    Automatic detection of API version

 configure.ac |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 152f676..9898a32 100644
--- a/configure.ac
+++ b/configure.ac
@@ -571,13 +571,13 @@ fi
 vala_api="No Vala bindings will be generated"
 if test "x$enable_vala" = "xyes"
 then
-       AM_PROG_VALAC([0.30.0])
+       AM_PROG_VALAC()
        if test "x$VALA_API_VERSION" = "x"
        then
-               VAPIGEN_CHECK([0.30.0],[0.30],,no)
-               vala_api="0.30 (Default)"
+               VAPIGEN_CHECK(,,,no)
+               vala_api="`pkg-config --modversion vapigen` (Default)"
        else
-               VAPIGEN_CHECK([0.30.0],$VALA_API_VERSION,,no)
+               VAPIGEN_CHECK(,$VALA_API_VERSION,,no)
                vala_api=$VALA_API_VERSION
        fi
 else