Fix an uninitialized value warning.

Warning from the static analyzer:

build/tools/zipalign/ZipFile.cpp:503:5: warning: Function call argument
is an uninitialized value
pEntry->setDataInfo(uncompressedLen, endPosn - startPosn, crc,

Specifically, it's referencing `crc`, which would be uninitialized if we
hit either of these two error cases, since we'd return `NO_ERROR`.

Note that the warning is still there, but that's only because the static
analyzer can't see the asserts. If we #undef NDEBUG in the file, then
the warning disappears.

Bug: none
Test: With NDEBUG undefined, the warning is gone.
Change-Id: Iaed66127746c38add2c842ab027f2e1982d0e2fd