Spammy precache_pic in master branch
precache_pic shows a warning if a file can't be precached (missing), previously it was silent:
E.g. the itemstime panel always generates this warning:
Couldn't load gfx/hud/luma/checkmark using "%s.tga", "%s.png", "%s.jpg", "%s.pcx" or "%s.lmp".
because it tries to precache checkmark.tga from gfx/hud/luma (missing) before loading the one from gfx/hud/default.
Another example when map previews are missing in the vote screen: https://sheoth.eu/f/xonotic20190920154539-00.jpg