kiss: Make 'kiss s' usage saner for scripting.

Changes 'kiss s' to only show the first match if run from a
subshell. Here's a simple example:

-> kiss s zlib
/home/dylan/projects/repo/core/zlib
/var/db/kiss/installed/zlib
-> echo $(kiss s zlib)
/home/dylan/projects/repo/core/zlib
->

kiss

@@ -115,7 +115,7 @@ pkg_find() {
     # Figure out which repository a package belongs to by
     # searching for directories matching the package name
     # in $KISS_PATH/*.
-    query=$1 match=$2 IFS=:; set --
+    query=$1 IFS=:; set --
 
     # Both counts of word-splitting are intentional here.
     # Firstly to split the repositories and secondly to
@@ -137,7 +137,7 @@ pkg_find() {
 
     # Show all search results if called from 'kiss search', else
     # print only the first match.
-    [ "$match" ] && printf '%s\n' "$@" || printf '%s\n' "$1"
+    [ -t 1 ] && printf '%s\n' "$@" || printf '%s\n' "$1"
 }
 
 pkg_list() {
@@ -1268,7 +1268,7 @@ args() {
 
         l|list)    pkg_list "$@" ;;
         u|update)  pkg_updates ;;
-        s|search)  for pkg do pkg_find "$pkg" all; done ;;
+        s|search)  for pkg do pkg_find "$pkg"; done ;;
         v|version) log kiss 1.10.3 ;;
 
         h|help|-h|--help|'')