libcamera: event_dispatcher_poll: Fix bitwise test

Add missing parentheses to fix a bitwise test.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/event_dispatcher_poll.cpp

@@ -210,7 +210,7 @@ int EventDispatcherPoll::poll(std::vector<struct pollfd> *pollfds)
 
 void EventDispatcherPoll::processInterrupt(const struct pollfd &pfd)
 {
-	if (!pfd.revents & POLLIN)
+	if (!(pfd.revents & POLLIN))
 		return;
 
 	uint64_t value;