Fix -e option (fixes #239) (#242)

z.sh

@@ -21,6 +21,7 @@
 #     * z -r foo  # cd to highest ranked dir matching foo
 #     * z -t foo  # cd to most recently accessed dir matching foo
 #     * z -l foo  # list matches instead of cd
+#     * z -e foo  # echo the best match, don't cd
 #     * z -c foo  # restrict matches to subdirs of $PWD
 
 [ -d "${_Z_DATA:-$HOME/.z}" ] && {
@@ -113,7 +114,7 @@ _z() {
             --) 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 $fnd";;
-                    e) local echo=echo;;
+                    e) local echo=1;;
                     h) echo "${_Z_CMD:-z} [-cehlrtx] args" >&2; return;;
                     l) local list=1;;
                     r) local typ="rank";;