cam: capture: Cache the EventLoop handler

Prepare for the ability to exit the event loop based on conditions in
the request complete handler by caching the pointer instead of passing
it as an argument.

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

src/cam/main.cpp

@@ -341,8 +341,8 @@ int CamApp::run()
 	}
 
 	if (options_.isSet(OptCapture)) {
-		Capture capture(camera_, config_.get());
-		return capture.run(loop_, options_);
+		Capture capture(camera_, config_.get(), loop_);
+		return capture.run(options_);
 	}
 
 	return 0;