minor

modules/features2d/src/surf.cpp

@@ -442,9 +442,9 @@ struct SURFInvoker
         int maxSize = 0;
         
         for( k = k1; k < k2; k++ )
-	{
+        {
             maxSize = std::max(maxSize, ((CvSURFPoint*)cvGetSeqElem( keypoints, k ))->size);
-	}
+        }
         
         maxSize = cvCeil((PATCH_SZ+1)*maxSize*1.2f/9.0f);
         Ptr<CvMat> winbuf = cvCreateMat( 1, maxSize > 0 ? maxSize*maxSize : 1, CV_8U );