Fix warn doc

Author: lbartoletti

python/core/geometry/qgsgeometryutils.sip.in

@@ -516,7 +516,8 @@ A method to project one skew line onto another.
 :param P12: is the second point that belongs to first skew line,
 :param P2: is the first point that belongs to second skew line,
 :param P22: is the second point that belongs to second skew line,
-:param X1: is the result projection point of line P2P22 onto line P1P12.
+:param X1: is the result projection point of line P2P22 onto line P1P12,
+:param epsilon: the tolerance to use.
 
 :return: true if such point exists, false - otherwise.
 %End

src/core/geometry/qgsgeometryutils.h

@@ -530,7 +530,8 @@ class CORE_EXPORT QgsGeometryUtils
      * \param P12 is the second point that belongs to first skew line,
      * \param P2 is the first point that belongs to second skew line,
      * \param P22 is the second point that belongs to second skew line,
-     * \param X1 is the result projection point of line P2P22 onto line P1P12.
+     * \param X1 is the result projection point of line P2P22 onto line P1P12,
+     * \param epsilon the tolerance to use.
      * \return true if such point exists, false - otherwise.
      */
     static bool skewLinesProjection( const QgsVector3D &P1, const QgsVector3D &P12,