(Re)Add moved func to fix reg test.

Author: TobiKattmann

SU2_CFD/include/variables/CAdjEulerVariable.hpp

@@ -102,6 +102,14 @@ class CAdjEulerVariable : public CVariable {
     for (unsigned long iVar = 0; iVar < nVar; iVar++) IntBoundary_Jump(iPoint,iVar) = val_IntBoundary_Jump[iVar];
   }
 
+  /*!
+   * \brief Set the momentum part of the truncation error to zero.
+   * \param[in] iPoint - Point index.
+   */
+  inline void SetVel_ResTruncError_Zero(unsigned long iPoint) final {
+    for (unsigned long iDim = 0; iDim < nDim; iDim++) Res_TruncError(iPoint,iDim+1) = 0.0;
+  }
+
   /*!
    * \brief Get the value of the force projection vector.
    * \return Pointer to the force projection vector.