Check for missing CPU temp as a string instead of arithmetically

get_hdd_temp.sh

@@ -47,7 +47,7 @@ cores=$((cores - 1))
 for core in $(seq 0 $cores); do
 #  temp="$(sysctl -a | grep "cpu.${core}.temp" | cut -c24-25 | tr -d "\n")"
   temp=$(sysctl -a | grep "cpu.${core}.temperature" | awk '{print $2}')
-  if [ "$temp" -lt 0 ]; then
+  if [ "$temp" -eq '-1' ]; then
     temp="--n/a--"
   else
     temp="${temp}C"