largefiles: let wirestore._stat return stats as expected by remotestore verify stable

largefiles: let wirestore._stat return stats as expected by remotestore verify

- preparing for fixing verify crash.

--- a/hgext/largefiles/remotestore.py	Sun Jan 27 11:39:51 2013 -0600
+++ b/hgext/largefiles/remotestore.py	Mon Jan 28 15:19:44 2013 +0100
@@ -74,7 +74,7 @@
         return lfutil.copyandhash(lfutil.blockstream(infile), tmpfile)
 
     def _verify(self, hashes):
-        return self._stat(hashes)
+        return dict((h, s == 0) for (h, s) in self._stat(hashes).iteritems())
 
     def _verifyfile(self, cctx, cset, contents, standin, verified):
         filename = lfutil.splitstandin(standin)

--- a/hgext/largefiles/wirestore.py	Sun Jan 27 11:39:51 2013 -0600
+++ b/hgext/largefiles/wirestore.py	Mon Jan 28 15:19:44 2013 +0100
@@ -26,6 +26,8 @@
         return self.remote.getlfile(hash)
 
     def _stat(self, hashes):
+        '''For each hash, return 2 if the largefile is missing, 1 if it has a
+        mismatched checksum, or 0 if it is in good condition'''
         batch = self.remote.batch()
         futures = {}
         for hash in hashes:
@@ -33,5 +35,5 @@
         batch.submit()
         retval = {}
         for hash in hashes:
-            retval[hash] = not futures[hash].value
+            retval[hash] = futures[hash].value
         return retval