declare some local vars unconditionally

So they don't pick up if e.g. tmux defines $echo

z.sh

@@ -110,20 +110,21 @@ _z() {
 
     else
         # list/go
+        local echo fnd last list opt typ
         while [ "$1" ]; do case "$1" in
-            --) while [ "$1" ]; do shift; local fnd="$fnd${fnd:+ }$1";done;;
-            -*) local opt=${1:1}; while [ "$opt" ]; do case ${opt:0:1} in
-                    c) local fnd="^$PWD $fnd";;
-                    e) local echo=1;;
+            --) while [ "$1" ]; do shift; fnd="$fnd${fnd:+ }$1";done;;
+            -*) opt=${1:1}; while [ "$opt" ]; do case ${opt:0:1} in
+                    c) fnd="^$PWD $fnd";;
+                    e) echo=1;;
                     h) echo "${_Z_CMD:-z} [-cehlrtx] args" >&2; return;;
-                    l) local list=1;;
-                    r) local typ="rank";;
-                    t) local typ="recent";;
+                    l) list=1;;
+                    r) typ="rank";;
+                    t) typ="recent";;
                     x) sed -i -e "\:^${PWD}|.*:d" "$datafile";;
                 esac; opt=${opt:1}; done;;
-             *) local fnd="$fnd${fnd:+ }$1";;
-        esac; local last=$1; [ "$#" -gt 0 ] && shift; done
-        [ "$fnd" -a "$fnd" != "^$PWD " ] || local list=1
+             *) fnd="$fnd${fnd:+ }$1";;
+        esac; last=$1; [ "$#" -gt 0 ] && shift; done
+        [ "$fnd" -a "$fnd" != "^$PWD " ] || list=1
 
         # if we hit enter on a completion just go there
         case "$last" in