Check existence of archive entry before checking file entry.
Check existence of archive entry before checking file entry.

git-svn-id: a2cff0f90f39e6325a32767035c13212b993b75d@1159 ca317041-1a13-0410-b3bf-f3d8fb9af60d

yak1ex/ax7z,yak1ex/ax7z