Try to make some more weakref tests more robust

test/tests/weakref1.py

@@ -19,4 +19,10 @@ def fact(n):
 
 w = doStuff()
 fact(10) # try to clear some memory
+
+def recurse(f, n):
+    if n:
+        return recurse(f, n - 1)
+    return f()
+recurse(gc.collect, 50)
 gc.collect()

test/tests/weakref_proxy.py

@@ -21,6 +21,12 @@ def getWR():
 
 wr = getWR()
 fact(100) # try to clear some memory
+
+def recurse(f, n):
+    if n:
+        return recurse(f, n - 1)
+    return f()
+recurse(gc.collect, 50)
 gc.collect()
 
 try: