industry/foc/fixed16/foc_ang_hall.c: fix warning
@@ -462,7 +462,9 @@ static int foc_angle_hl_run_b16(FAR foc_angle_b16_t *h,
FAR struct foc_hall_b16_s *hl = NULL;
int ret = OK;
int8_t sector = -1;
+#ifdef CONFIG_INDUSTRY_FOC_ANGLE_HALL_EST
b16_t tmp1 = 0;
+#endif
DEBUGASSERT(h);
