Exit with error status when an exception occurred.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2537 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/tests/functional/__init__.py

@@ -82,7 +82,7 @@ class NEOProcess(object):
             # If we reach this line, exec call failed (is it possible to reach
             # it without going through above "except" branch ?).
             print 'Error executing %r.' % (command + ' ' + ' '.join(args), )
-            self._exit()
+            self._exit(-1)
 
     def _exit(self):
 	# KeyboardInterrupt is not intercepted by test runner (it is still