[gobject-introspection] Don't fail if no --output option is specified

[Colin Walters <walters src gnome org>]

commit 31317a9ffa31af959dd51eedfa2f31f586687475
Author: Colin Walters <walters verbum org>
Date:   Thu Jun 11 09:53:35 2009 -0400

    Don't fail if no --output option is specified
    
    Printing to stdout is legitimate.
---
 giscanner/dumper.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/giscanner/dumper.py b/giscanner/dumper.py
index 8b85ae5..e6a8148 100644
--- a/giscanner/dumper.py
+++ b/giscanner/dumper.py
@@ -91,7 +91,8 @@ class DumpCompiler(object):
     # Public API
 
     def run(self):
-        print '  GEN   ' + self._options.output
+        print '  GEN   ' + (self._options.output and
+                            self._options.output or '<stdout>')
         c_path = self._generate_tempfile('.c')
         f = open(c_path, 'w')
         f.write(_PROGRAM_TEMPLATE)