Compile PlatON warning in function test_005ParametersSet_0002SetNonceSuccess

[PanHH]

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02Parameters.c: In function 'test_005ParametersSet_0002SetNonceSuccess':
02Parameters.c:310:2: warning: pointer targets in initialization differ in signedness [-Wpointer-sign]
  ck_assert_str_eq(tx_ptr.rawtx_fields.nonce.field, NONCE.field);
  ^~~~~~~~~~~~~~~~
02Parameters.c:310:2: warning: pointer targets in initialization differ in signedness [-Wpointer-sign]