Fix char*->String in create method

modules/tracking/include/opencv2/tracking/tracker.hpp

@@ -1273,7 +1273,7 @@ public:
 
 	@return True if new target initialization went succesfully, false otherwise
 	*/
-	bool addTarget(const Mat& image, const Rect2d& boundingBox, char* tracker_algorithm_name);
+	bool addTarget(const Mat& image, const Rect2d& boundingBox, String tracker_algorithm_name);
 
 	/** @brief Update all trackers from the tracking-list, find a new most likely bounding boxes for the targets
 	@param image The current frame

modules/tracking/src/multiTracker.cpp

@@ -44,7 +44,7 @@
 namespace cv
 {
 	//Multitracker
-	bool MultiTracker::addTarget(const Mat& image, const Rect2d& boundingBox, char* tracker_algorithm_name)
+	bool MultiTracker::addTarget(const Mat& image, const Rect2d& boundingBox, String tracker_algorithm_name)
 	{
 		Ptr<Tracker> tracker = Tracker::create(tracker_algorithm_name);
 		if (tracker == NULL)