[gobject-introspection] scanner: Don't duplicate fatal message text

[Colin Walters <walters src gnome org>]

commit efa132538fde19eb2ce5e93866bbbff26a0d09ff
Author: Colin Walters <walters verbum org>
Date:   Wed Sep 29 13:55:16 2010 -0400

    scanner: Don't duplicate fatal message text

 giscanner/message.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/giscanner/message.py b/giscanner/message.py
index 4aa63f4..ec7ace0 100644
--- a/giscanner/message.py
+++ b/giscanner/message.py
@@ -126,9 +126,10 @@ If the warning is related to a ast.Node type, see log_node_warning()."""
             text = (
 '''%s: %s: %s: %s\n''' % (last_position, error_type, self._namespace.name, text))
 
-        self._output.write(text)
         if log_type == FATAL:
             raise SystemExit(text)
+        else:
+            self._output.write(text)
 
     def log_node(self, log_type, node, text, context=None, positions=None):
         """Log a warning, using information about file positions from