Fix bug #52290 (setDate, setISODate, setTime works wrong when DateTime created from timestamp)

Author: smalyshev

ext/date/php_date.c

@@ -3085,6 +3085,7 @@ PHP_FUNCTION(date_isodate_set)
 	dateobj->time->y = y;
 	dateobj->time->m = 1;
 	dateobj->time->d = 1;
+	memset(&dateobj->time->relative, 0, sizeof(dateobj->time->relative));
 	dateobj->time->relative.d = timelib_daynr_from_weeknr(y, w, d);
 	dateobj->time->have_relative = 1;
 

ext/date/tests/bug52290.phpt

@@ -23,5 +23,5 @@ var_dump($dt->format('o-\WW-N | Y-m-d | H:i:s | U'));
 --EXPECTF--
 string(47) "2005-W52-7 | 2006-01-01 | 00:00:00 | 1136073600"
 string(47) "2005-W52-1 | 2005-12-26 | 00:00:00 | 1135555200"
-string(47) "2007-W40-5 | 2007-10-10 | 00:00:00 | 1191974400"
-string(47) "2007-W40-5 | 2007-10-10 | 20:30:40 | 1192048240"
+string(47) "2007-W41-3 | 2007-10-10 | 00:00:00 | 1191974400"
+string(47) "2007-W41-3 | 2007-10-10 | 20:30:40 | 1192048240"