Update powerwall.sh

powerwall.sh

@@ -21,7 +21,7 @@ CHECKTEMP(){
 	else
 		for SENSOR in ${!SENSOR_ID[@]}; do
 			reading=$(CHECKTEMPSENSOR ${SENSOR})
-			c=0; cw=40; spc=''; spc1=${cw}-${#SENSOR}; until [ $c = ${spc1} ]; do spc="${spc} "; c=`expr $c + 1`; done
+			c=0; cw=30; spc=''; spc1=`expr ${cw} - ${#SENSOR}`; until [ $c = ${spc1} ]; do spc="${spc} "; c=`expr $c + 1`; done
 			echo "${SENSOR}${spc}: ${reading}"
 		done
 	fi