test_reduce fails for size = 3

[magoorden]

The tests in this library are not runned frequently. For #16, I am creating a test case and thus enabling running test_cdd again. I noticed that the current test fails for test_reduce with input size = 3:

test_cdd: /home/martijn/Documents/UCDD/test/test_cdd.cpp:223: void test_reduce(size_t): Assertion `cdd2 == cdd3' failed.

[mikucionisaau]

Yes, that's the reason the test with size=10 is disabled for 64bits.
Interestingly it passes for 32 bits.
Which means there is some aweful C code messing with integer/pointer sizes.
I think we need to revise all the code concerning the pseudo-hashing using pointers.
They probably assume 32bit pointer arithmetic, but something goes wrong.