Fixed problem loading savedata after r3306 (mode=FILES): savedata created before r3306 does not have a SAVEDATA_FILE_LIST value stored in the PARAM.SFO file. Provide a compatibility mode for those savedata files created before r3306.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3324 4ab978e6-3352-0410-996c-0b42db0051c8