fix creation of changelog

tools/git2debcl

@@ -21,8 +21,10 @@ import argparse
 def git_tags():
     args = ["git", "tag", '-l']
     tags = subprocess.check_output(args)
-    tags = tags.split()
+    tags = [[int(X) for X in tag.split(".")] for tag in tags.split()]
+    tags.sort()
     tags.reverse()
+    tags = [".".join([str(X) for X in tag]) for tag in tags]
     return tags
 
 def git_log(fromtag,totag):