correction bash_completion

git-svn-id: svn+ssh://imag/users/huron/danjean/svnroot/claire/altree/trunk@147 cf695345-040a-0410-a956-b889e835fe2e

bash_completion

@@ -2,7 +2,7 @@
 
 _altree_option_list()
 {
-    altree --help 2> /dev/null | \
+    "${COMP_WORDS[0]}" --help 2> /dev/null | \
 	sed -e '0,/^Options/d;/^    --/{s/^    //;s/^--\(man\|help\).*/--\1/;p};d'
 }