dbghelp: Directly use Heap functions.

[Eric Pouech]

Markus Amsler a écrit :
> This reduces WoW debug symbol load time from about 100s to 18!
this also removes two key design features:
- memory is free:d (as Dimitry already pointed out)
- a memory pool is associated to every module, so that all allocations 
for a specific module are free:d when the module is unloaded

A+

-- 
Eric Pouech
"The problem with designing something completely foolproof is to underestimate the ingenuity of a complete idiot." (Douglas Adams)