update-comps should be checking for distro usage

scripts/update-comps

@@ -3,9 +3,9 @@
 COMPSFILE=$1
 DISTRO=$2
 
-if [ -z "$COMPSFILE" ]; then
-    echo "Usage: $0 <compsfile>"
-    exit 1
+if [ -z "$COMPSFILE" ] || [ -z "$DISTRO" ]; then
+  echo "Usage: $0 <compsfile> <distro>"
+  exit 1
 fi
 
 LANG=C intltool-merge -x -u po/ $COMPSFILE.in $COMPSFILE