ccalib: don't convert vector<Keypoint> into Mat-like structures

modules/ccalib/include/opencv2/ccalib.hpp

@@ -71,7 +71,7 @@ public:
 
 	bool isInitialized();
 
-	void getPatternPoints(OutputArray original_points);
+	void getPatternPoints(std::vector<KeyPoint>& original_points);
     /**<
 		Returns a vector<Point> of the original points.
 	*/

modules/ccalib/src/ccalib.cpp

@@ -405,9 +405,9 @@ bool CustomPattern::findPattern(InputArray image, OutputArray matched_features,
     return (!m_ftrs.empty());
 }
 
-void CustomPattern::getPatternPoints(OutputArray original_points)
+void CustomPattern::getPatternPoints(std::vector<KeyPoint>& original_points)
 {
-    return Mat(keypoints).copyTo(original_points);
+    original_points = keypoints;
 }
 
 double CustomPattern::getPixelSize()