ENH: add guarded lookup for dimensionedSet

...ions/solvers/electromagnetics/magneticFoam/createFields.H

...se/reactingEulerFoam/reactingTwoPhaseEulerFoam/pU/UEqns.H

...e/reactingEulerFoam/reactingTwoPhaseEulerFoam/pUf/UEqns.H

...uctivityModel/HrenyaSinclair/HrenyaSinclairConductivity.C

...s/viscosityModel/HrenyaSinclair/HrenyaSinclairViscosity.C

...eTurbulenceModels/phasePressureModel/phasePressureModel.C

...eTurbulenceModels/phasePressureModel/phasePressureModel.H

applications/solvers/multiphase/twoPhaseEulerFoam/pU/UEqns.H

...ications/solvers/multiphase/twoPhaseEulerFoam/pUf/UEqns.H

...uctivityModel/HrenyaSinclair/HrenyaSinclairConductivity.C

...neticTheoryModels/kineticTheoryModel/kineticTheoryModel.C

...s/viscosityModel/HrenyaSinclair/HrenyaSinclairViscosity.C

...eTurbulenceModels/phasePressureModel/phasePressureModel.C

...eTurbulenceModels/phasePressureModel/phasePressureModel.H

...lities/preProcessing/createZeroDirectory/solverTemplate.C

src/OpenFOAM/dimensionSet/dimensionSet.H

src/OpenFOAM/dimensionSet/dimensionSetIO.C

src/OpenFOAM/dimensionSet/dimensionSets.H

...s/DimensionedFields/DimensionedField/DimensionedFieldIO.C

...fields/UniformDimensionedFields/UniformDimensionedField.C