When returning an error from jcompile() (which is passed through by PyNode_Compile()), make sure that an exception is actually set -- otherwise someone stomped on our error.  [2.0 checkin of this fix.]
When returning an error from jcompile() (which is passed through by
PyNode_Compile()), make sure that an exception is actually set --
otherwise someone stomped on our error.  [2.0 checkin of this fix.]

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator