fix memory PyObject * typemaps to avoid memory leaks with iterators

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8375 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/python/langobj_runme.py

@@ -1,7 +1,13 @@
+import sys
 from langobj import *
 
 
 x ="hello"
-
-if identity(x) != x:
+rx = sys.getrefcount(x)
+v = identity(x)
+rv = sys.getrefcount(v)
+if v != x:
+    raise RuntimeError
+
+if rv - rx != 1:
     raise RuntimeError