dh_python2: do not try to add python2.X dependency if private dir works

with all Python versions

debian/changelog

@@ -7,6 +7,8 @@ python-defaults (2.7.2-10) unstable; urgency=low
 
   [ Piotr Ożarowski ]
   * pycompile: fix -O option
+  * dh_python2: do not try to add python2.X dependency if private dir works
+    with all Python versions
 
  -- Matthias Klose <doko@debian.org>  Tue, 24 Jan 2012 11:49:24 +0100
 

debpython/depends.py

@@ -143,7 +143,9 @@ class Dependencies(object):
                     # are scripts for different Python versions: compile with
                     # default Python version (or the one requested via X-P-V)
                     args += "-V %s" % vrange_str(vr)
-                    if vr[0] == vr[1]:
+                    if vr == (None, None):
+                        pass
+                    elif vr[0] == vr[1]:
                         self.depend("python%s" % vrepr(vr[0]))
                     else:
                         if vr[0]:  # minimum version specified