Add missing check for null pointer

ApplicationLibCode/ProjectDataModel/Surfaces/RimFileSurface.cpp

@@ -120,11 +120,13 @@ void RimFileSurface::fieldChangedByUi( const caf::PdmFieldHandle* changedField,
 bool RimFileSurface::updateSurfaceData()
 {
     bool result = true;
-    if ( m_triangleMeshData->geometry().first.empty() )
+    if ( !m_triangleMeshData || m_triangleMeshData->geometry().first.empty() )
     {
         result = loadDataFromFile();
     }
 
+    if ( !m_triangleMeshData ) return false;
+
     auto [vertices, tringleIndices] = m_triangleMeshData->geometry();
 
     auto surface = new RigSurface;