[gdl] Fix library version number

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 49312c3ae77d92ca8cfa7009c0f3b971160f1866
Author: SÃbastien Granjoux <seb sfo free fr>
Date:   Sun Jul 1 15:03:48 2012 +0200

    Fix library version number

 configure.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index 34bf697..e79b7d3 100644
--- a/configure.in
+++ b/configure.in
@@ -15,7 +15,7 @@ GDL_MINOR_VERSION=5
 GDL_MICRO_VERSION=4
 
 dnl increment if the interface has additions, changes, removals.
-GDL_CURRENT=2
+GDL_CURRENT=4
 
 dnl increment any time the source changes; set to
 dnl  0 if you increment CURRENT