server_data.pbo\DZ\server\scripts\players\player_igniteFireplace.sqf contains the following SQF script to determine if wind should blow out the match before you can light a fire.

----------

_windStrength = (wind select 0) + (wind select 1) + (wind select 2);
_probability = 0;

//set probability to ignite against wind
switch true do
{
case (_windStrength > 13.9):
{

		_probability = 0.25;

};
case (_windStrength > 10.8):
{

		_probability = 0.5;

};
case (_windStrength > 5.4):
{

		_probability = 0.7;

};
case (_windStrength > 1.5):
{

		_probability = 0.8;

};
case (_windStrength > 0):
{

		_probability = 1;

};
};

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If _windStrength is exactly 0, then _probability remains at 0, so there is no chance for the fire to ignite when there is no wind to stop it.

If the values in the wind array are not normalised (which they probably aren't since the wind will have direction) then _windStrength can be a negative number, again resulting in 0% chance for the fire to light in even the lightest of winds, or possibly resulting in a low value for extremely high winds making the chance to light high when it should be very low.