quick fix

lib/self-upgrade.bash

@@ -18,8 +18,9 @@ function self_upgrade {
   fi
 }
 
+#TODO: to remove
 function repair_miaou_bash_dir {
-  if [[ -v MIAOU_BASH_DIR ]]; then
+  if [[ ! -v MIAOU_BASH_DIR ]]; then
     >&2 echo 'WARNING: MIAOU_BASH_DIR undefined : repair-mode enabled'
     MIAOU_BASH_DIR=/opt/miaou-bash
     export MIAOU_BASH_DIR