[pygobject] Fix "release-news" make target

[Martin Pitt <martinpitt src gnome org>]

commit 8209c1ae1632c77768699481e574d5d378956e71
Author: Martin Pitt <martinpitt gnome org>
Date:   Tue Jun 5 19:04:49 2012 +0200

    Fix "release-news" make target
    
    Actually list changes since the previous release, not since 3.1.92.

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 35e4eb1..89066c3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -98,7 +98,7 @@ release-tag:
 release-news:
 	printf "%-8s%s\n" "$(VERSION)" "`LC_TIME=C date '+%d-%b-%Y'`" > NEWS.tmp
 	last=`head -n1 NEWS | cut -f1 -d' '`; \
-	git log --format='format:        - %s (%aN)%n%b' 3.1.92.. | \
+	git log --format='format:        - %s (%aN)%n%b' $$last.. | \
 	  sed -n '/^        -/ p; /bugzilla.gnome.org/ { s/^.*id=\([0-9]\+\).*$$/          (#\1)/; p}' >> NEWS.tmp
 	echo >> NEWS.tmp
 	cat NEWS >> NEWS.tmp