Use correct types in QResource.

Use correct types in QResource.

qHash() returns uint, not int, so change all interactions with hashing to use
uint to match.

This blocks the introduction of a new (better) hashing algorithm because it
currently breaks numerous tests: rcc would (correctly) write a uint hash value
to the qrc files, but QResource would attempt to mangle it around as an int.

This wasn't a problem with the old hash, because it deliberately threw away
data (h &= 0x0fffffff), possibly because of someone not being able to
diagnose precisly this problem.

Change-Id: I46fb42acc100fdd3bedd714f6dc91aeca91d0351
Reviewed-by: hjk <qthjk@ovi.com>