Compile PlatON warning in function test_005ParametersSet_0004SetValueSuccess

[PanHH]

Describe the bug
Compile PlatON warning in function test_005ParametersSet_0004SetValueSuccess

02Parameters.c: In function 'test_005ParametersSet_0004SetValueSuccess':
02Parameters.c:355:2: warning: pointer targets in initialization differ in signedness [-Wpointer-sign]
  ck_assert_str_eq(tx_ptr.rawtx_fields.value.field, value.field);
  ^~~~~~~~~~~~~~~~
02Parameters.c:355:2: warning: pointer targets in initialization differ in signedness [-Wpointer-sign]