Fix implicit global variable that threw an exception when used in strict mode.

lib/search-query-parser.js

@@ -61,6 +61,7 @@ exports.parse = function (string, options) {
     // Reverse to ensure proper order when pop()'ing.
     terms.reverse();
     // For each search term
+    var term;
     while (term = terms.pop()) {
       // Advanced search terms syntax has key and value
       // separated with a colon