Prevent division by 0 error in battery usage OSD element
If the `bat_capacity` was set to 0 (the default) then it would result in a division by 0.
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@ -1014,7 +1014,7 @@ static void osdElementMainBatteryUsage(osdElementParms_t *element)
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const float value = constrain(batteryConfig()->batteryCapacity - getMAhDrawn(), 0, batteryConfig()->batteryCapacity);
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// Calculate mAh used progress
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const uint8_t mAhUsedProgress = ceilf((value / (batteryConfig()->batteryCapacity / MAIN_BATT_USAGE_STEPS)));
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const uint8_t mAhUsedProgress = (batteryConfig()->batteryCapacity) ? ceilf((value / (batteryConfig()->batteryCapacity / MAIN_BATT_USAGE_STEPS))) : 0;
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// Create empty battery indicator bar
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element->buff[0] = SYM_PB_START;
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