Ensure _.times doesn't error when passed negative numbers.

Former-commit-id: 5d694743fbda0f477250fe3c90cf29168834ac6f

test/test.js

@@ -2603,6 +2603,20 @@
     test('should return an array of the results of each `callback` execution', function() {
       deepEqual(_.times(3, function(n) { return n * 2; }), [0, 2, 4]);
     });
+
+    test('should coerce `n` to a number', function() {
+      deepEqual(_.times(null), []);
+    });
+
+    test('should not error on negative `n` values', function() {
+      var pass = true;
+      try {
+        _.times(-1);
+      } catch(e) {
+        pass = false;
+      }
+      ok(pass);
+    });
   }());
 
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