Use proper type on if statement.

Periodic reminder that the number 0 evaluates to
false in JavaScript.

fix #15

Author: caike

jquery.simple.timer.js

@@ -103,9 +103,9 @@
     var secondsLeft = element.data('seconds-left');
     var minutesLeft = element.data('minutes-left');
 
-    if(secondsLeft){
+    if(Number.isFinite(secondsLeft)){
       return parseInt(secondsLeft, 10);
-    } else if(minutesLeft) {
+    } else if(Number.isFinite(minutesLeft)) {
       return parseFloat(minutesLeft) * 60;
     }else {
       throw 'Missing time data';

tests/tests.js

@@ -74,6 +74,35 @@ asyncTest('Clears the timer when complete and with options', function () {
   });
 });
 
+
+asyncTest('Cleas the timer when 0 minutes left', function () {
+  expect(1);
+
+  var timerElement = $('#timer1');
+  timerElement.data('minutes-left', 0);
+
+  var plugin = timerElement.startTimer({});
+
+  setTimeout(function() {
+    equal(timerElement.text(), '00:00:00', 'Cleared timer');
+    start();
+  }, 1000);
+});
+
+asyncTest('Clears the timer when 0 seconds left', function () {
+  expect(1);
+
+  var timerElement = $('#timer1');
+  timerElement.data('seconds-left', 0);
+
+  var plugin = timerElement.startTimer({});
+
+  setTimeout(function() {
+    equal(timerElement.text(), '00:00:00', 'Cleared timer');
+    start();
+  }, 1000);
+});
+
 asyncTest('Do not restart timer when loop option is false', function() {
   expect(1);