[PATCH 1 of 2] convert: svn -- fix 'exists'

[Kirill Smelkov]

# HG changeset patch
# User Kirill Smelkov <kirr at landau.phys.spbu.ru>
# Date 1192274523 -14400
# Node ID ab4d2e9f3b97a0a1cd4898c5fba0d409b0077a96
# Parent  fe9b0bb3eb1c7c37f8e3efa27d48b48cc777ea48
convert: svn -- fix 'exists'

Previously 'exists' erroneously returned False for empty dirictories. This is
wrong since we want to detect even empty 'branches/' or 'tags/'.

diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -158,10 +158,11 @@ class svn_source(converter_source):
 
     def exists(self, path, optrev):
         try:
-            return svn.client.ls(self.url.rstrip('/') + '/' + path,
+            svn.client.ls(self.url.rstrip('/') + '/' + path,
                                  optrev, False, self.ctx)
+            return True
         except SubversionException, err:
-            return []
+            return False
 
     def getheads(self):
         # detect standard /branches, /tags, /trunk layout