Fix the following warnings during compilation time:
Fix the following warnings during compilation time:

  ext/fizzbuzz/fizzbuzz.c:32: warning: 'validate_limit' declared 'static' but never defined
  ext/fizzbuzz/fizzbuzz.c: In function 'return_values':
  ext/fizzbuzz/fizzbuzz.c:170: warning: 'array' may be used uninitialized in this function

Signed-off-by: Krzysztof Wilczynski <9bf091559fc98493329f7d619638c79e91ccf029@linux.com>

kwilczynski/ruby-fizzbuzz,kwilczynski/ruby-fizzbuzz,kwilczynski/ruby-fizzbuzz