fixed opMemcacheSessionStorage, because it calls session_start() two or more times (fixes #1324)
fixed opMemcacheSessionStorage, because it calls session_start() two or more times (fixes #1324)

nise-nabe/ppcon-sns,C-nakajima/OpenPNE3,ShinichiU/OpenPNE3,isaosano/OpenPNE3,nishizoe/OpenPNE3,nishizoe/OpenPNE3,tejima/OP3PKG,openpne/OpenPNE3,openpne/OpenPNE3,ShinichiU/OpenPNE3,upsilon/travis-test,kashiwasan/symfony-advanced,openpne/OpenPNE3,tejima/OP3PKG,isaosano/OpenPNE3,C-nakajima/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/AuthFramework,nise-nabe/ppcon-sns,ShinichiU/AuthFramework,isaosano/OpenPNE3,ShinichiU/OpenPNE3,openpne/OpenPNE3,upsilon/travis-test,isaosano/OpenPNE3,kashiwasan/symfony-advanced,ShinichiU/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/AuthFramework