Use our own Fopen instead of libc's fopen.

Common/CreateFile.cpp

Common/GmshMessage.cpp

Common/OS.cpp

Common/OpenFile.cpp

Common/Options.cpp

Common/SmoothData.cpp

Common/StringUtils.cpp

Common/onelab.h

Fltk/graphicWindow.cpp

Fltk/onelabGroup.cpp

Fltk/pluginWindow.cpp

Fltk/projectionEditor.cpp

Fltk/statisticsWindow.cpp

Geo/CellComplex.cpp

Geo/GFace.cpp

Geo/GFaceCompound.cpp

Geo/GModelIO_ACIS.cpp

Geo/GModelIO_BDF.cpp

Geo/GModelIO_DIFF.cpp

Geo/GModelIO_GEO.cpp