types: don't rely on implicit type conversion in ucv_compare()
Don't implicitly convert intptr_t difference to int8_t but perform explicit comparisons
Don't implicitly convert strcmp() int result to int8_t
fs: explicitly compare isatty() result
Reportedly, automatic conversion of the isatty() int result value to a bool does not work correctly on PPC. Explicitly compare the result value with 1 to infer the boolean result value.
intptr_tdifference toint8_tbut perform explicit comparisonsstrcmp()int result toint8_tisatty()resultisatty()int result value to a bool does not work correctly on PPC. Explicitly compare the result value with1to infer the boolean result value.