fix minimal compile

Geo/Curvature.cpp

Geo/GFace.cpp

Geo/GFaceCompound.h

Mesh/BackgroundMesh.cpp

Mesh/Generator.cpp

Mesh/QuadTriExtruded2D.cpp

Mesh/QuadTriUtils.cpp

Mesh/highOrderTools.h

Mesh/meshGFaceLloyd.cpp

Mesh/meshGFaceLloyd.h

Mesh/meshGRegionMMG3D.cpp

utils/misc/gmsh_app.plist