fix precise build (followup 3667651)

Author: jef-n

python/core/qgsdistancearea.sip

@@ -64,9 +64,23 @@ class QgsDistanceArea
     //! measures line
     double measureLine( const QList<QgsPoint>& points );
 
-    //! measures line with one segment
+    /** Measures length of line with one segment
+     * @param p1 start of line
+     * @param p2 end of line
+     * @returns distance in meters, or map units if cartesian calculation was performed
+     */
     double measureLine( const QgsPoint& p1, const QgsPoint& p2 );
 
+    /** Measures length of line with one segment and returns units of distance.
+     * @param p1 start of line
+     * @param p2 end of line
+     * @param units will be set to units of measure
+     * @returns calculated distance between points. Distance units are stored in units parameter.
+     * @note backported from QGIS 2.12 (where it is const)
+     * @note not available in python bindings
+     */
+    // double measureLine( const QgsPoint& p1, const QgsPoint& p2, QGis::UnitType& units );
+
     //! measures polygon area
     double measurePolygon( const QList<QgsPoint>& points );
 

src/core/qgsdistancearea.cpp

@@ -465,7 +465,7 @@ double QgsDistanceArea::measureLine( const QgsPoint &p1, const QgsPoint &p2 )
   return measureLine( p1, p2, units );
 }
 
-double QgsDistanceArea::measureLine( const QgsPoint& p1, const QgsPoint& p2, QGis::UnitType& units ) const
+double QgsDistanceArea::measureLine( const QgsPoint& p1, const QgsPoint& p2, QGis::UnitType& units )
 {
   double result;
   units = mCoordTransform->sourceCrs().mapUnits();

src/core/qgsdistancearea.h

@@ -100,16 +100,17 @@ class CORE_EXPORT QgsDistanceArea
      * @param p2 end of line
      * @returns distance in meters, or map units if cartesian calculation was performed
      */
-    double measureLine( const QgsPoint& p1, const QgsPoint& p2 ) const;
+    double measureLine( const QgsPoint& p1, const QgsPoint& p2 );
 
     /** Measures length of line with one segment and returns units of distance.
      * @param p1 start of line
      * @param p2 end of line
      * @param units will be set to units of measure
      * @returns calculated distance between points. Distance units are stored in units parameter.
-     * @note added in QGIS 2.12
+     * @note backported from QGIS 2.12 (where it is const)
+     * @note not available in python bindings
      */
-    double measureLine( const QgsPoint& p1, const QgsPoint& p2, QGis::UnitType& units ) const;
+    double measureLine( const QgsPoint& p1, const QgsPoint& p2, QGis::UnitType& units );
 
     //! measures polygon area
     double measurePolygon( const QList<QgsPoint>& points );