Minor improvements to convert.sh.

modules/convert/convert.sh

@@ -8,5 +8,5 @@ shift
 if [ -z "$units" ]; then
 msg "$chan" "I do not have access to units."
 else
-msg "$chan" "$($units -v $@ | head -n1)"
+msg "$chan" "$($units -v ${*#* } | head -n1)"
 fi