fix regression with empty array in constructor, close #3

Author: mourner

index.js

@@ -9,7 +9,7 @@ function TinyQueue(data, compare) {
     this.length = this.data.length;
     this.compare = compare || defaultCompare;
 
-    if (data) {
+    if (this.length > 0) {
         for (var i = (this.length >> 1); i >= 0; i--) this._down(i);
     }
 }

test.js

@@ -53,3 +53,11 @@ test('handles edge cases with few elements', function (t) {
 
     t.end();
 });
+
+test('handles init with empty array', function (t) {
+    var queue = tinyQueue([]);
+
+    t.same(queue.data, []);
+
+    t.end();
+});