Various wordplay fixes:

* Don't add blank lines to the dictionary.
 * Fix broken word length check in `score_word`.
 * Prevent event handler from submitting blank words.

examples/wordplay/client/wordplay.js

@@ -132,9 +132,8 @@ Template.scratchpad.events({
   'click button, keyup input': function (evt) {
     var textbox = $('#scratchpad input');
     // if we clicked the button or hit enter
-    if (evt.type === "click" ||
-        (evt.type === "keyup" && evt.which === 13)) {
-
+    if ((evt.type === "click" || (evt.type === "keyup" && evt.which === 13))
+        && textbox.val()) {
       var word_id = Words.insert({player_id: Session.get('player_id'),
                                   game_id: game() && game()._id,
                                   word: textbox.val().toUpperCase(),

examples/wordplay/model.js

@@ -106,7 +106,8 @@ Meteor.methods({
     // that the word is at least three chars, isn't already used, and is
     // possible to make on the board.
     if (game.clock === 0
-        || word.length < 3
+        || !word.word
+        || word.word.length < 3
         || Words.find({game_id: word.game_id, word: word.word}).count() > 1
         || paths_for_word(game.board, word.word).length === 0) {
       Words.update(word._id, {$set: {score: 0, state: 'bad'}});
@@ -129,8 +130,8 @@ Meteor.methods({
 if (Meteor.isServer) {
   DICTIONARY = {};
   _.each(Assets.getText("enable2k.txt").split("\n"), function (line) {
-    // Skip comment lines
-    if (line.indexOf("//") !== 0) {
+    // Skip blanks and comment lines
+    if (line && line.indexOf("//") !== 0) {
       DICTIONARY[line] = true;
     }
   });