cmake PDC_HAVE_VSSCANF examples

Bill-Gray/PDCursesMod cmake/gen_config_header.cmake :4 

CHECK_FUNCTION_EXISTS(vsscanf PDC_HAVE_VSSCANF)

Bill-Gray/PDCursesMod cmake/gen_config_header.cmake :11 

ENDIF(PDC_HAVE_VSSCANF)