[kernel] improve code quality following recommendation of Codacy
@@ -54,7 +54,7 @@ public:
/** basic constructor
* \param size size of the ns law
*/
- NewtonImpactRollingFrictionNSL(unsigned int size);
+ explicit NewtonImpactRollingFrictionNSL(unsigned int size);
/** constructor with the value of the NewtonImpactRollingFrictionNSL attributes
* \param en double : normal e coefficient
