zlib: remove redundant variable in zlibBufferOnEnd
Removes a redundant variable, which is never assigned, from the zlibBufferOnEnd
function. Most likely it's a leftover from one of recent refactorings.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines