stats: fix incorrect ass formatting on 3rd page when vo was switched

When switching between having a video visible or not,
stats.lua now picks up the required formatting changes
for the cache stats page to display correctly.

player/lua/stats.lua

@@ -610,6 +610,7 @@ end
 local function cache_stats()
     local stats = {}
 
+    eval_ass_formatting()
     add_header(stats)
     append(stats, "", {prefix=o.nl .. o.nl .. "Cache info:", nl="", indent=""})