[svn r49974] Restore the following behavior: py.test exits with an exit code 1

when there are failures.

--HG--
branch : trunk

py/test/session.py

@@ -89,6 +89,7 @@ class Session(AbstractSession):
                 self.footer(colitems) 
         except Exit, ex:
             pass
+        return self.getitemoutcomepairs(Failed)
 
     def runtraced(self, colitem):
         if self.shouldclose():