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alsamixer: fix division by zero

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The attempt to divide by max-min fails if a control has only one valid
value.  In this case, adjust the maximum so that the computation can
succeed; the control will look like 0%.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2010-02-19 17:07:20 +01:00
parent 69c6bead43
commit 5a016b583b
1 changed files with 2 additions and 0 deletions
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2
alsamixer/mixer_display.c
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@ -462,6 +462,8 @@ static void display_control(unsigned int control_index)
err = snd_mixer_selem_get_capture_volume_range(control->elem, &min, &max);
if (err < 0)
return;
if (min == max)
max = min + 1;
if (control->flags & IS_ACTIVE)
wattrset(mixer_widget.window, 0);