use preinst-swig in all the examples

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@7821 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/python/callback/Makefile

@@ -1,5 +1,5 @@
 TOP        = ../..
-SWIG       = $(TOP)/../swig
+SWIG       = $(TOP)/../preinst-swig
 CXXSRCS    = example.cxx
 TARGET     = example
 INTERFACE  = example.i

Examples/python/callback/runme.py

@@ -12,14 +12,6 @@ class PyCallback(example.Callback):
 		example.Callback.__init__(self)
 	def run(self):
 		print "PyCallback.run()"
-	def __del__(self):
-		print "PyCallback.__del__()"
-		# for shadow class extensions that are not "disowned" and
-		# define a __del__ method, it is very important to call the 
-		# base class __del__.  otherwise the c++ objects will never
-		# be deleted.
-		example.Callback.__del__(self)
-
 
 # Create an Caller instance