safe_eval: re-raise the same exception type when completing it.

bzr revid: vmt@openerp.com-20130226094446-7c2dw5c5eou0lg8r

openerp/tools/safe_eval.py

@@ -245,6 +245,6 @@ def safe_eval(expr, globals_dict=None, locals_dict=None, mode="eval", nocopy=Fal
     except Exception, e:
         import sys
         exc_info = sys.exc_info()
-        raise ValueError, '"%s" while evaluating\n%r' % (ustr(e), expr), exc_info[2]
+        raise exc_info[0], '"%s" while evaluating\n%r' % (ustr(e), expr), exc_info[2]
 
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