fixed some issue on error treatment, some typo

lib/aaa_errors.sh

@@ -4,14 +4,19 @@
 function die()
 {
     local errorcode=$1
-    [[ $2 == "--force" ]] && unset KEEPGOING
 
-    if [[ $KEEPGOING ]]; then
+    # Don't trigger the ERR signal as we already managed the error
+    trap - ERR
+    
+    if [[ "$KEEPGOING" != "true" || "$2" == "--force" ]]; then
 	prnt E "Sortie prématuré avec erreur (code #$errorcode)."
 	exit $errorcode
     else
 	prnt W "On continue malgrés l'erreur #$errorcode."
     fi
+    
+    # Put the trigger back (only executed with --keepgoing)
+    trap "error ${LINENO}" ERR
 }
 export -f die
 
@@ -40,7 +45,7 @@ function error()
 
     # Print error header
     prnt E "${BIWhite}*** ${BIRed}Une erreur fatale est intervenue, \
-        le script va s'arrêter immédiatement !$DEFAULTCOL"
+le script va s'arrêter immédiatement !$DEFAULTCOL"
 
     # Print backtrace
     backtrace 2