Description:
------------
IntlDateFormatter formatObject returns wrong value when time style is NONE (-1) because the code at line 149 in ext/intl/dateformat/dateformat_format_object.cpp 

//there's no support for relative time in ICU yet
timeStyle = (DateFormat::EStyle)(timeStyle & ~DateFormat::kRelative);

We can check timeStyle first, if it is not NONE style, process it like above code.

New code

//there's no support for relative time in ICU yet
if (timeStyle != DateFormat::NONE) {
timeStyle = (DateFormat::EStyle)(timeStyle & ~DateFormat::kRelative);
}