Fixed page overlap for file revision links in hgweb.

This is another step to fix issue189, but currently the file revision numbers
are read as changeset revision numbers, so the link will point to the wrong
revision.

mercurial/hgweb/hgweb_mod.py

@@ -310,12 +310,12 b' class hgweb(object):'
         fl = fctx.filelog()
         count = fl.count()
         pagelen = self.maxshortchanges
+        pos = fctx.filerev()
+        start = max(0, pos - pagelen + 1) 
+        end = min(count, start + pagelen)
+        pos = end - 1
 
         def entries(**map):
-            pos = fctx.filerev()
-            start = max(0, pos - pagelen + 1) 
-            end = min(count, start + pagelen)
-            pos = end - 1
             l = []
             parity = (count - 1) & 1
 
@@ -338,7 +338,7 b' class hgweb(object):'
             for e in l:
                 yield e
 
-        nav = revnavgen(fctx.filerev(), self.maxshortchanges, count)
+        nav = revnavgen(pos, pagelen, count)
         yield self.t("filelog", file=f, node=hex(fctx.node()), nav=nav,
                      entries=entries)