bugfix: do not call memcmp for nil strings
bugfix: do not call memcmp for nil strings

russpowers/Nim,russpowers/Nim,dom96/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim