really silent this time in case of write error in user directory

rationale: if a user's directory isn't writeable, then autojump is
probably his last concern :)

autojump.bash

@@ -25,7 +25,7 @@ _autojump()
         return 0
 }
 complete -F _autojump j
-AUTOJUMP='(autojump -a "$(pwd -P)"&)>/dev/null 2>>${HOME}/.autojump_errors'
+AUTOJUMP='{ (autojump -a "$(pwd -P)"&)>/dev/null 2>>${HOME}/.autojump_errors;} 2>/dev/null'
 if [[ ! $PROMPT_COMMAND =~ autojump ]]; then
   export PROMPT_COMMAND="${PROMPT_COMMAND:-:} && $AUTOJUMP"
 fi 

autojump.zsh

@@ -15,7 +15,7 @@
 #along with autojump.  If not, see <http://www.gnu.org/licenses/>.
 
 function autojump_preexec() {
-    (autojump -a "$(pwd -P)"&)>/dev/null 2>>|${HOME}/.autojump_errors
+    { (autojump -a "$(pwd -P)"&)>/dev/null 2>>|${HOME}/.autojump_errors ; } 2>/dev/null
 }
 
 typeset -ga preexec_functions