[shotwell] build: Use proper argument for AX_IS_RELEASE

[Jens Georg <jensgeorg src gnome org>]

commit e031ef34362cb656b40ddf7ad36e192a5b59b50f
Author: Jens Georg <mail jensge org>
Date:   Mon Mar 13 18:59:27 2017 +0100

    build: Use proper argument for AX_IS_RELEASE
    
    Signed-off-by: Jens Georg <mail jensge org>

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 9bd09b9..bf356ed 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ m4_define([package_version],[major_version.minor_version.micro_version])
 m4_define([bug_report_url],[https://bugzilla.gnome.org/enter_bug.cgi?product=shotwell])
 m4_define([api_version],[major_version])
 
-AX_IS_RELEASE([micro-version])
+AX_IS_RELEASE([git-directory])
 
 m4_define([git_version],[m4_esyscmd(git rev-parse HEAD 2>/dev/null)])