fix bug for Array.sort(null) on FF

Author: bfulton

package.json

@@ -1,6 +1,6 @@
 {
   "name": "regex-trigram",
-  "version": "0.0.7",
+  "version": "0.0.8",
   "description": "JavaScript port of portions of Google Code Search",
   "author": "Bright Fulton",
   "main": "lib/regex.js",

src/regex-query.js

@@ -727,7 +727,11 @@ var clean = function(s, isSuffix) {
   if (s.length === 0) {
     return s;
   }
-  s = s.sort(isSuffix ? suffixComparator : null);
+  if (isSuffix) {
+    s = s.sort(suffixComparator);
+  } else {
+    s = s.sort();
+  }
   var sPrime = [s[0]];
   for (var i = 1; i < s.length; i++) {
     var val = s[i];