fix alias precheck

src/intertyper.js

@@ -73,7 +73,7 @@ function intertyper(data, sidePass, baseLineNums) {
           if (!testType) {
             var global = /([@%\w\d\.\" $-]+) = .*/.exec(line);
             var globalIdent = toNiceIdent(global[1]);
-            var testAlias = /[@%\w\d\.\" $-]+ = alias .*/.exec(line);
+            var testAlias = /[@%\w\d\.\" $-]+ = (hidden )?alias .*/.exec(line);
             Variables.globals[globalIdent] = {
               name: globalIdent,
               alias: !!testAlias,