uinteger->pointer doesn't work properly on 32bit environment

[Takashi Kato]

If the given integer is more than 0x7FFFFFFF then it turns to -1. Thus it's the same behaviour as integer->pointer.

In ffi_stub.stub it uses Sg_GetInteger instead of Sg_GetUInteger.

[Takashi Kato]

Fixing uinteger->pointer on 32 bit. (Fixes #117)

→ <<cset 19245f5285eb>>