added list type assertion for samples to "new sound" primitive

HISTORY.md

@@ -18,6 +18,8 @@
 * objects, threads: added "new sound" from list of samples primitive reporter to "sound" category
 * objects, threads: added sampling rate input to "new sound" primitive
 * threads: changed default name for new costumes created with STRETCH etc. to localized 'costume'
+* threads: generate stereo sounds
+* threads: added list type assertion for samples to "new sound" primitive
 
 ### 2019-10-18
 * objects, blocks, threads: added dimension getters for the stage

src/threads.js

@@ -2826,6 +2826,7 @@ Process.prototype.reportNewSoundFromSamples = function (samples, rate) {
         myself = this;
 
     if (isNil(this.context.accumulator)) {
+        this.assertType(samples, 'list'); // check only the first time
         this.context.accumulator = {
             audio: null
         };