Correction of some warnings

modules/line_descriptor/include/opencv2/line_descriptor/descriptor.hpp

@@ -75,7 +75,7 @@ struct CV_EXPORTS KeyLine
 
   /* coordinates of the middlepoint */
   CV_PROP_RW
-  Point pt;
+  Point2f pt;
 
   /* the response, by which the strongest keylines have been selected.
    It's represented by the ratio between line's length and maximum between

modules/line_descriptor/src/binary_descriptor.cpp

@@ -39,19 +39,14 @@
  //
  //M*/
 
-
-
 #include "precomp.hpp"
 
 #define NUM_OF_BANDS 9
 
-
-
 //using namespace cv;
 namespace cv
 {
 
-
 /* combinations of internal indeces for binary descriptor extractor */
 static const int combinations[32][2] =
 {
@@ -265,7 +260,7 @@ int BinaryDescriptor::descriptorSize() const
 static inline int get2Pow( int i )
 {
   if( i >= 0 && i <= 7 )
-    return pow( 2, i );
+    return pow( 2, (double) i );
 
   else
   {
@@ -372,7 +367,7 @@ void BinaryDescriptor::detectImpl( const Mat& imageSrc, std::vector<KeyLine>& ke
       kl.octave = osl.octaveCount;
       kl.size = ( osl.endPointX - osl.startPointX ) * ( osl.endPointY - osl.startPointY );
       kl.response = osl.lineLength / max( images_sizes[osl.octaveCount].width, images_sizes[osl.octaveCount].height );
-      kl.pt = Point( ( osl.endPointX + osl.startPointX ) / 2, ( osl.endPointY + osl.startPointY ) / 2 );
+      kl.pt = Point2f( ( osl.endPointX + osl.startPointX ) / 2, ( osl.endPointY + osl.startPointY ) / 2 );
 
       /* store KeyLine */
       keylines.push_back( kl );
@@ -386,7 +381,7 @@ void BinaryDescriptor::detectImpl( const Mat& imageSrc, std::vector<KeyLine>& ke
     for ( size_t keyCounter = 0; keyCounter < keylines.size(); keyCounter++ )
     {
       KeyLine kl = keylines[keyCounter];
-      if( mask.at<uchar>( kl.startPointY, kl.startPointX ) == 0 && mask.at<uchar>( kl.endPointY, kl.endPointX ) == 0 )
+      if( mask.at<uchar>( (int) kl.startPointY, (int) kl.startPointX ) == 0 && mask.at<uchar>( (int) kl.endPointY, (int) kl.endPointX ) == 0 )
         keylines.erase( keylines.begin() + keyCounter );
     }
   }