fuel_gauge: sbs_gauge: fix negative currents

Fix negative currents being read as extremely high currents due to
unsigned variable use.

Signed-off-by: Jordan Yates <[email protected]>

Author: JordanYates

drivers/fuel_gauge/sbs_gauge/sbs_gauge.c

@@ -83,7 +83,7 @@ static int sbs_gauge_get_prop(const struct device *dev, fuel_gauge_prop_t prop,
 		break;
 	case FUEL_GAUGE_CURRENT:
 		rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_CURRENT, &tmp_val);
-		val->current = tmp_val * 1000;
+		val->current = (int16_t)tmp_val * 1000;
 		break;
 	case FUEL_GAUGE_FULL_CHARGE_CAPACITY:
 		rc = sbs_cmd_reg_read(dev, SBS_GAUGE_CMD_FULL_CAPACITY, &tmp_val);