make c_setmode compatible with Borland C; refs #5157
make c_setmode compatible with Borland C; refs #5157

russpowers/Nim,russpowers/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,tulayang/Nim,tulayang/Nim,tulayang/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,dom96/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim