[FIX] Fix naxx slime

[Wall-core]

This name parse won't work; use the RootWMOID instead:

if (rootWMO->RootWMOID == 4489) // Stratholme_raid.wmo WMOID == 4489

core/contrib/vmap_extractor/vmapextract/wmo.cpp

Line 481 in f401a67

if (filename.find("Stratholme_raid") != string::npos)

The hackfix for slime can then be removed from player.cpp