8079841: Buffer underflow with empty zip entry names Summary: check for zero-length entry name before accessing "last" byte Reviewed-by: sherman, martin

js1->foo+
−
js2->foo+
−
js3->foo+
−
handler->foo+
−
js1->foo+
−
js2->foo+
−
js3->foo+
−
all-new-handler->foo+
−