Fix exit code for check-ignore.

NEWS

@@ -32,7 +32,7 @@
 
   * Add basic support for reading ignore files in ``dulwich.ignore``.
     ``dulwich.porcelain.add`` and ``dulwich.porcelain.status`` now honor
-    ignores. (Jelmer Vernooij, Segev Finer, #524)
+    ignores. (Jelmer Vernooij, Segev Finer, #524, #526)
 
   * New ``dulwich.porcelain.check_ignore`` command.
     (Jelmer Vernooij)

bin/dulwich

@@ -512,8 +512,11 @@ class cmd_check_ignore(Command):
     def run(self, args):
         parser = optparse.OptionParser()
         options, args = parser.parse_args(args)
+        ret = 1
         for path in porcelain.check_ignore('.', args):
             print(path)
+            ret = 0
+        return ret
 
 
 class cmd_help(Command):