fix syntax

sound.cm

@@ -35,16 +35,16 @@ var player = soundwave.create({
 
 // Load and cache PCM data from a file path
 audio.pcm = function pcm(file) {
-  file = res.find_sound(file)
-  if (!file) return null
-  
+  var path = res.find_sound(file)
+  if (!path) return null
+
   // Check player's cache first
-  if (player.pcm_cache[file]) return player.pcm_cache[file]
-  
-  var buf = io.slurp(file)
+  if (player.pcm_cache[path]) return player.pcm_cache[path]
+
+  var buf = io.slurp(path)
   if (!buf) return null
-  
-  return player.decode(buf, file)
+
+  return player.decode(buf, path)
 }
 
 // Play a sound file, returns voice object
@@ -73,11 +73,12 @@ feeder.resume_device()
 
 // Audio pump - called periodically to fill the audio buffer
 function pump() {
+  var mixed = null
   while (feeder.queued() < CHUNK_BYTES * 3) {
-    var mixed = player.pull(FRAMES_PER_CHUNK)
+    mixed = player.pull(FRAMES_PER_CHUNK)
     feeder.put(mixed)
   }
-  
+
   $delay(pump, 1/240)
 }