empty initializers are not allowed in ANSI C (#1695)

CHANGELOG.txt

contrib/MathEx/mathex.cpp

doc/texinfo/gmsh.texi

doc/texinfo/opt_fields.texi

doc/texinfo/opt_mesh.texi

examples/boolean/extend_field.geo

src/common/DefaultOptions.h

src/mesh/BackgroundMeshTools.cpp

src/mesh/Field.cpp

src/mesh/meshGRegionHxt.cpp

src/mesh/meshGRegionMMG.cpp

src/parser/Gmsh.tab.cpp

src/parser/Gmsh.y

tutorials/c++/t10.cpp

tutorials/c/t2.c

tutorials/python/t10.py

tutorials/t10.geo