Yet another ivar setting.

src/Web-Snippets.js

@@ -215,7 +215,7 @@ messageSends: ["toArray", "find:"]
 $globals.HTMLSnippet);
 
 
-$core.setInstanceVariables($globals.HTMLSnippet.a$cls, ["current"]);
+$core.setSlots($globals.HTMLSnippet.a$cls, ["current"]);
 $core.addMethod(
 $core.method({
 selector: "current",