show_int_val
void show_int_val(int, const char *, char *, int);
show_int_val(ri.volume, varname[OPTION_VOLUME], "", silent);
show_int_val(ri.chan, varname[OPTION_CHANNEL], "", silent);
show_int_val(ri.rfreq, varname[OPTION_REFERENCE], "kHz", silent);
show_int_val(ri.lock, varname[OPTION_SENSITIVITY], "mkV", silent);