[syslinux] New Memory Allocation

[Shao Miller]

In Syslinux-5.00, is the goal that the core and .c32 modules alike will use
the same heap?  There is a bug I am thinking about:

- QEmu with 1024 MiB RAM
- Syslinux 4.06
- .c32 can realloc() up to 1013 MiB

- QEmu with 1024 MiB RAM
- Syslinux 5.00-pre9
- .c32 can realloc() up to 45 MiB

I am wondering if there's a maximum-allocation-size being hit, or if it's
actually a bug I should look for.

- Shao Miller