xfree() is a macro, also setting its argument to NULL

source/texk/web2c/luatexdir/font/mapfile.c

source/texk/web2c/luatexdir/font/subfont.c

source/texk/web2c/luatexdir/font/texfont.c

source/texk/web2c/luatexdir/font/writecff.c

source/texk/web2c/luatexdir/font/writet3.c

source/texk/web2c/luatexdir/image/epdf.h

source/texk/web2c/luatexdir/image/writeimg.c

source/texk/web2c/luatexdir/lua/limglib.c

source/texk/web2c/luatexdir/lua/llualib.c

source/texk/web2c/luatexdir/ocp/readocp.c

source/texk/web2c/luatexdir/pdf/pdfgen.c

source/texk/web2c/luatexdir/pdf/pdfobj.c

source/texk/web2c/luatexdir/ptexlib.h

source/texk/web2c/luatexdir/tex/stringpool.c

source/texk/web2c/luatexdir/utils/managed-sa.c

source/texk/web2c/luatexdir/utils/managed-sa.h