Fix warning on test suite found by Clang Analyzer

test.c:2210:9: warning: Value stored to 'char_len' is never read
        char_len = 2;
        ^          ~
test.c:2921:3: warning: Value stored to 'pass' is never read
  pass &= (parsed == 0);
  ^       ~~~~~~~~~~~~~

Reviewed-By: Fedor Indutny <fedor@indutny.com>