minor changes

modules/features2d/src/detectors.cpp

@@ -575,8 +575,9 @@ void GridAdaptedFeatureDetector::detectImpl( const Mat& image, vector<KeyPoint>&
             vector<KeyPoint> sub_keypoints;
             detector->detect( sub_image, sub_keypoints, sub_mask );
             keepStrongest( maxPerCell, sub_keypoints );
-            for( std::vector<cv::KeyPoint>::iterator it = sub_keypoints.begin(), end = sub_keypoints.end();
-                 it != end; ++it )
+            std::vector<cv::KeyPoint>::iterator it = sub_keypoints.begin(),
+                                                end = sub_keypoints.end();
+            for( ; it != end; ++it )
             {
                 it->pt.x += col_range.start;
                 it->pt.y += row_range.start;
@@ -618,7 +619,9 @@ void PyramidAdaptedFeatureDetector::detectImpl( const Mat& image, vector<KeyPoin
         // Detect on current level of the pyramid
         vector<KeyPoint> new_pts;
         detector->detect( src, new_pts, src_mask );
-        for( vector<KeyPoint>::iterator it = new_pts.begin(), end = new_pts.end(); it != end; ++it)
+        vector<KeyPoint>::iterator it = new_pts.begin(),
+                                   end = new_pts.end();
+        for( ; it != end; ++it)
         {
             it->pt.x *= multiplier;
             it->pt.y *= multiplier;

modules/features2d/src/draw.cpp

@@ -113,10 +113,12 @@ void drawKeypoints( const Mat& image, const vector<KeyPoint>& keypoints, Mat& ou
     bool isRandColor = _color == Scalar::all(-1);
 
     CV_Assert( !outImage.empty() );
-    for( vector<KeyPoint>::const_iterator i = keypoints.begin(), ie = keypoints.end(); i != ie; ++i )
+    vector<KeyPoint>::const_iterator it = keypoints.begin(),
+                                     end = keypoints.end();
+    for( ; it != end; ++it )
     {
         Scalar color = isRandColor ? Scalar(rng(256), rng(256), rng(256)) : _color;
-        _drawKeypoint( outImage, *i, color, flags );
+        _drawKeypoint( outImage, *it, color, flags );
     }
 }
 

modules/features2d/src/sift.cpp

@@ -1663,7 +1663,9 @@ void SIFT::operator()(const Mat& image, const Mat& mask,
         // filter points by subMask and convert the points coordinates from subImage size to image size
         KeyPointsFilter::runByPixelsMask( keypoints, subMask );
         int dx = brect.x, dy = brect.y;
-        for( vector<KeyPoint>::iterator it = keypoints.begin(); it != keypoints.end(); ++it )
+        vector<KeyPoint>::iterator it = keypoints.begin(),
+                                   end = keypoints.end();
+        for( ; it != end; ++it )
         {
             it->pt.x += dx;
             it->pt.y += dy;