mapfile.c:    if (e->firstfont != getnullfont()) {
mapfile.c:            pdfcharmap[f][i] = pdfcharmap[e->firstfont][i];
mapfile.c:        e->firstfont = f;
ptexlib.h:    internalfontnumber firstfont;   /* first font that has accessed to this
writeenc.c:    enc_ptr->firstfont = getnullfont();
