sekrit: check if key exists with cp

bin/sekrit.sh

@@ -111,7 +111,7 @@ sekrit_cp()
 	[ $# -eq 1 ] || usage
 	key=$1
 
-	sekrit_get "$key" |
+	sekrit_has "$key" && sekrit_get "$key" |
 	    xclip $rmlastnl -loops 1 -quiet -selection clip 2>/dev/null
 }