hgweb: always compute all entries and latestentry in filelog

This is the same thing which was done for changelog earlier, and it doesn't
affect performance at all. This change will make it possible to get the first
entry of the next page easily without computing the list twice.

mercurial/hgweb/webcommands.py

@@ -836,15 +836,11 def filelog(web, req, tmpl):
     end = min(count, start + revcount) # last rev on this page
     parity = paritygen(web.stripecount, offset=start - end)
 
-    def entries(latestonly):
+    def entries():
         l = []
 
         repo = web.repo
         revs = repo.changelog.revs(start, end - 1)
-        if latestonly:
-            for r in revs:
-                pass
-            revs = (r,)
         for i in revs:
             iterfctx = fctx.filectx(i)
 
@@ -868,11 +864,14 def filelog(web, req, tmpl):
         for e in reversed(l):
             yield e
 
+    entries = list(entries())
+    latestentry = entries[:1]
+
     revnav = webutil.filerevnav(web.repo, fctx.path())
     nav = revnav.gen(end - 1, revcount, count)
     return tmpl("filelog", file=f, node=fctx.hex(), nav=nav,
-                entries=lambda **x: entries(latestonly=False),
-                latestentry=lambda **x: entries(latestonly=True),
+                entries=entries,
+                latestentry=latestentry,
                 revcount=revcount, morevars=morevars, lessvars=lessvars)
 
 def archive(web, req, tmpl):