#5 adding int64_t and memory test

[Chris T]

Adding 64bit integer and memory checking. Not tested on other UNIX

[Chris T]

Patch to add int64_t support, and generic memory buffer tests

[Bruno Raoult]

I can see issues in CuAssertMemEquals_LineMsg:

1) If one of actual/expected is NULL, we will get a segfault:

if ((expected == NULL && actual == NULL) ||    // both NULL
    (expected != NULL && actual != NULL &&     // both non NULL
     (memcmp(expected, actual, len)) == 0))
{
    return;
}

/* below, dereferenced expected/actual are used, but we may have
 * one NULL, and get segfault.
 */

2) buf is filled before checking for overflow. It means we can have an overflow:
For example:

c += sprintf(&buf[c],"expected <\n");
assert(c < sizeof(buf));