[Pas2js] AV on compile since r931

[Ondrej Pokorny]

The attached patch fixes the compilation for me, but I don't know if 
anything else is needed (compiler\packages\pastojs\src\fppas2js.pp - I 
don't know why I cannot create a patch from root).

Thanks
Ondrej

-------------- next part --------------
Index: fppas2js.pp
===================================================================
--- fppas2js.pp	(Revision 47401)
+++ fppas2js.pp	(Arbeitskopie)
@@ -26521,7 +26521,7 @@
       btSmallInt,btWord,
       btLongint,btLongWord,
       btIntDouble,btUIntDouble,
-      btString,btChar,
+      btString,btUnicodeString,btChar,
       btDouble,
       btBoolean,
       btPointer: