regressions: Fix for common alarm prefixes.

regressions/common.h

@@ -171,12 +171,12 @@ prefix##_common_win_alarm(void *unused)								\
 	bool timer_success = false;									\
 	for (;;) {											\
 		WaitForSingleObjectEx(alarm_event_name, INFINITE, true);				\
-		timer_success = SetWaitableTimer(common_win_alarm_timer,			\
+		timer_success = SetWaitableTimer(prefix##_common_win_alarm_timer,			\
-						 &common_alarm_timer_length,			\
+						 &prefix##_common_alarm_timer_length,			\
 						 0,							\
-						 common_win_alarm_handler, NULL, false);	\
+						 prefix##_common_win_alarm_handler, NULL, false);	\
 		assert(timer_success != false);								\
-		WaitForSingleObjectEx(common_win_alarm_timer, INFINITE, true);			\
+		WaitForSingleObjectEx(prefix##_common_win_alarm_timer, INFINITE, true);			\
 	}												\
 													\
 	return NULL;											\