Update SU2_CFD/include/output/COutput.hpp

Author: bigfooted

SU2_CFD/include/output/COutput.hpp

@@ -295,7 +295,7 @@ class COutput {
   unsigned short nRequestedVolumeFields;
 
   /*! \brief Minimum required volume fields for restart file. */
-  std::vector<string> requiredVolumeFields = {"COORDINATES", "SOLUTION"};
+  std::vector<string> requiredVolumeFields = {"COORDINATES", "SOLUTION", "GRID_VELOCITY"};
   /*! \brief Minimum required volume fields for restart file. */
   unsigned short nRequiredVolumeFields = 2;