Fix Mesh_Quality volume output for incompressible flow introduced in #1104.

Author: TobiKattmann

SU2_CFD/src/output/CFlowIncOutput.cpp

@@ -629,6 +629,14 @@ void CFlowIncOutput::LoadVolumeData(CConfig *config, CGeometry *geometry, CSolve
     }
     SetVolumeOutputValue("Q_CRITERION", iPoint, GetQ_Criterion(&(Node_Flow->GetGradient_Primitive(iPoint)[1])));
   }
+
+  // Mesh quality metrics
+  if (config->GetWrt_MeshQuality()) {
+    SetVolumeOutputValue("ORTHOGONALITY", iPoint, geometry->Orthogonality[iPoint]);
+    SetVolumeOutputValue("ASPECT_RATIO",  iPoint, geometry->Aspect_Ratio[iPoint]);
+    SetVolumeOutputValue("VOLUME_RATIO",  iPoint, geometry->Volume_Ratio[iPoint]);
+  }
+
 }
 
 void CFlowIncOutput::LoadSurfaceData(CConfig *config, CGeometry *geometry, CSolver **solver, unsigned long iPoint, unsigned short iMarker, unsigned long iVertex){
@@ -648,13 +656,6 @@ void CFlowIncOutput::LoadSurfaceData(CConfig *config, CGeometry *geometry, CSolv
     SetVolumeOutputValue("Y_PLUS", iPoint, solver[FLOW_SOL]->GetYPlus(iMarker, iVertex));
   }
 
-  // Mesh quality metrics
-  if (config->GetWrt_MeshQuality()) {
-    SetVolumeOutputValue("ORTHOGONALITY", iPoint, geometry->Orthogonality[iPoint]);
-    SetVolumeOutputValue("ASPECT_RATIO",  iPoint, geometry->Aspect_Ratio[iPoint]);
-    SetVolumeOutputValue("VOLUME_RATIO",  iPoint, geometry->Volume_Ratio[iPoint]);
-  }
-
 }
 
 bool CFlowIncOutput::SetInit_Residuals(CConfig *config){