Call node.rev() instead of int(node)

The int(node) method has been removed in 4.6.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

git-remote-hg

@@ -463,9 +463,9 @@ def mark_to_rev(mark):
 # Get a range of revisions in the form of a..b (git committish)
 def gitrange(repo, a, b):
     positive = []
-    pending = set([int(b)])
-    negative = set([int(a)])
-    for cur in xrange(b, -1, -1):
+    pending = set([b.rev()])
+    negative = set([a.rev()])
+    for cur in xrange(b.rev(), -1, -1):
         if not pending:
             break