Fix: fading never resolves in some cases (fixes goldfire#1368)

Author: alvov

src/howler.core.js

@@ -1362,16 +1362,16 @@
         lastTick = Date.now();
         vol += diff * tick;
 
+        // Round to within 2 decimal points.
+        vol = Math.round(vol * 100) / 100;
+
         // Make sure the volume is in the right bounds.
         if (diff < 0) {
           vol = Math.max(to, vol);
         } else {
           vol = Math.min(to, vol);
         }
 
-        // Round to within 2 decimal points.
-        vol = Math.round(vol * 100) / 100;
-
         // Change the volume.
         if (self._webAudio) {
           sound._volume = vol;