Comment out early stop in renderer reset as it results in broken renderings.

common/renderer.go

@@ -148,9 +148,13 @@ func (r *Renderer) SetPos(xOfs, zOfs int16) {
 
 func (r *Renderer) Reset() {
 
+	/* TODO: Figure out why this early stop results
+	   in broken renderings.
+
 	if r.IsEmpty() {
 		return
 	}
+	*/
 
 	yb := r.yBuffer
 	yb = yb[:len(yb)]