Initialized check in ZipFileRO::findEntryByName

If a ZipFileRO object is uninitialized, the hash table will not have
been initialized. This condition wasn't checked in findEntryByName.

Bug: 3121109
Change-Id: Ib696e0e7e0cb4dd0fb2e456d6a847e5e8f4fe14e
1 file changed