Fix for issue #937; static initializers must statically initialize super class. Also includes a fix for a possible ICE in GenerateJavaAST.java when JDT hands us a ThisRef while processing field initializers in an interface. Review by: mmendez, alex.tkachman git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@956 8db76d5a-ed1c-0410-87a9-c151d255dfc7