stinst: Avoid running into recursion in ProxyNamespace

(STInST.STClassLoaderObjects.ProxyNamespace
	on: Smalltalk for: STInST.STClassLoader new) displayString

triggered a DNU and after fixing that it ended with an infinite
recursion as the value is self. Avoid the recursion but this is
probably not the right fix.

2013-03-31  Holger Hans Peter Freyther  <holger@freyther.de>

	* tests/stcompiler.ok: Update the test result.
	* tests/stcompiler.st: Add a testcase for ProxyNamespace>>#printOn:.

2013-03-31  Holger Hans Peter Freyther  <holger@freyther.de>

	* STLoaderObjs.st: Change ProxyNamespace>>#printOn to avoid
	recursion into self.