fix potential problem when replacing chunk with itself

sokra · sokra · commit 83301ab2d6d7 · 2018-01-21T11:11:52.000+01:00
diff --git a/lib/ChunkGroup.js b/lib/ChunkGroup.js
@@ -92,7 +92,7 @@ class ChunkGroup {
 		if(newIdx < oldIdx) {
 			this.chunks.splice(oldIdx, 1);
 			return true;
-		} else {
+		} else if(newIdx !== oldIdx) {
 			this.chunks[oldIdx] = newChunk;
 			this.chunks.splice(newIdx, 1);
 			return true;
