[PATCH 2 of 3 stable] convert: fix svn crash when svn.ra.get_log calls back with orig_paths=None

[Mads Kiilerich]

# HG changeset patch
# User Mads Kiilerich <madski at unity3d.com>
# Date 1384649790 18000
#      Sat Nov 16 19:56:30 2013 -0500
# Branch stable
# Node ID 1c6f532e2965a133ba7780891e6f65e3b179bb58
# Parent  969c649f5fdf7b0a8f066456432ee401511f5255
convert: fix svn crash when svn.ra.get_log calls back with orig_paths=None

get_log started calling back with orig_paths=None on Fedora 20 with
subversion-1.8.3. That broke test-convert-svn-source.t .

There used to be some handling of that situation until e8f4e40f285a apparently
broke it. This patch restores what seems to be the most obvious handling of the
situation.

diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -91,10 +91,11 @@ def get_log_child(fp, url, paths, start,
                   discover_changed_paths=True, strict_node_history=False):
     protocol = -1
     def receiver(orig_paths, revnum, author, date, message, pool):
+        paths = {}
         if orig_paths is not None:
             for k, v in orig_paths.iteritems():
-                orig_paths[k] = changedpath(v)
-        pickle.dump((orig_paths, revnum, author, date, message),
+                paths[k] = changedpath(v)
+        pickle.dump((paths, revnum, author, date, message),
                     fp, protocol)
 
     try: