Update jbig2dec thirdparty to latest.

ccxvii · ccxvii · commit 831affabd27e · 2013-02-14T13:42:43.000+01:00
diff --git a/thirdparty/jbig2dec b/thirdparty/jbig2dec
@@ -1 +1 @@
-Subproject commit 7a82fc0abd135e08875ec4941ba43e832bc1b7f3
+Subproject commit 3e6c1b0670740be3b138228dcc134bf5e6c1eceb
