[zsh] Declare variable as local before assignment (#2266)

shell/key-bindings.zsh

@@ -45,6 +45,7 @@ __fsel() {
     -o -type d -print \
     -o -type l -print 2> /dev/null | cut -b3-"}"
   setopt localoptions pipefail no_aliases 2> /dev/null
+  local item
   eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS" $(__fzfcmd) -m "$@" | while read item; do
     echo -n "${(q)item} "
   done