8135179: Fix conversion warning after 8067341
Summary: Add required casts.
Reviewed-by: tschatzl, goetz
<?xml version="1.0" encoding="ISO-8859-1"?>
<excludeList>
<test id="JDK-8014647.js" />
<test id="javaclassoverrides.js" />
<test id="JDK-8020809.js" />
</excludeList>