Correct non-UTF8 handling in HtmlInputStreamReader

This change corrects the code to set the right encoding in the case when
the external encoding has been determined to be non-UTF8.

src/nu/validator/htmlparser/io/HtmlInputStreamReader.java

@@ -169,7 +169,8 @@ public HtmlInputStreamReader(InputStream inputStream,
             } else {
                 err(Encoding.msgLegacyEncoding(encoding.getCanonName()));
                 if (driver != null) {
-                    driver.setEncoding(Encoding.UTF16, Confidence.CERTAIN);
+                    // XXX Why did we do driver.setEncoding(encoding.UTF16... ?
+                    driver.setEncoding(encoding, Confidence.CERTAIN);
                 }
             }
         }