StaticInitializer.prettyPrint print static for empty block

[Loïc Girault]

Code of StaticInitializer.prettyPrint in java4/frontend/PrettyPrint.jadd print the keyword static even for an empty body. Its code is the following

public void StaticInitializer.prettyPrint(PrettyPrinter out) {
    out.print("static ");    
    if (!blockIsEmpty()) {
      out.print(getBlock());
    }
  }

it should be replaced by

public void StaticInitializer.prettyPrint(PrettyPrinter out) {
    if (!blockIsEmpty()) {
      out.print("static ");
      out.print(getBlock());
    }
  }

[Jesper Öqvist]

Don't pretty-print static initializer if empty

fixes #140 (bitbucket)

→ <<cset eb49d1c220fd>>