[BUG] Clients missing models

[Leystryku]

Hey,
If a client is missing a model the error will be put in clientside_errors.txt.
Since the errors aren't there to be spammed if people don't have CSS, it would be nice for things like Missing models not to be saved.
E.g:

noah|106|STEAM_0:0:50664276
Model missing: models/weapons/w_eq_flashbang_thrown.mdl

WaffleCookie|93|STEAM_0:1:52134410
Model missing: models/weapons/w_eq_flashbang_thrown.mdl