Fix dataflow gap

[EKarpulevich]

Self-dependencies of instructions already described and linked in "createInitialMap" function.
In function "findDefinition" we shouldn't link self-dependencies.
For examle next two instructions won't be linked:
0000000804842302 add t0, t1, qword t2
0000000804842303 and qword t2, qword ffffffffh, t2
because "and" will find "and" as definition

I used the following function for testing:

int bad(char * user)
{
        printf(user);
}