make tmpRow proper size before copyTo to avoid reallocated tmpCol (#10860)

* make tmpRow proper size before copyTo to avoid reallocated tmpCol

* do the transposition without creating temporary array; replace TAB with spaces.

* revert the previous commit

modules/calib3d/src/circlesgrid.cpp

@@ -117,6 +117,7 @@ void CirclesGridClusterFinder::hierarchicalClustering(const std::vector<Point2f>
         Mat tmpRow = dists.row(minIdx);
         Mat tmpCol = dists.col(minIdx);
         cv::min(dists.row(minLoc.x), dists.row(minLoc.y), tmpRow);
+        tmpRow = tmpRow.t();
         tmpRow.copyTo(tmpCol);
 
         clusters[minIdx].splice(clusters[minIdx].end(), clusters[maxIdx]);