[gobject-introspection] scanner: fail if cpp fails

[Johan Dahlin <johan src gnome org>]

commit 03b55dac443422add618ec61343fea3c0181c5ca
Author: Vincent Untz <vuntz gnome org>
Date:   Mon Sep 20 00:33:50 2010 +0200

    scanner: fail if cpp fails
    
    https://bugzilla.gnome.org/show_bug.cgi?id=630101

 giscanner/sourcescanner.py |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/giscanner/sourcescanner.py b/giscanner/sourcescanner.py
index e449f50..20339e4 100644
--- a/giscanner/sourcescanner.py
+++ b/giscanner/sourcescanner.py
@@ -298,7 +298,12 @@ class SourceScanner(object):
             if len(data) < 4096:
                 break
         fp.seek(0, 0)
+
         assert proc, 'Proc was none'
+        proc.wait()
+        if proc.returncode != 0:
+            raise SystemExit('Error while processing the source.')
+
         self._scanner.parse_file(fp.fileno())
         fp.close()
         os.unlink(tmp)