Some more common errors

Some more common errors

Here are a few other common errors with xlc:

305 | switch((((np)->navigation_type) ? (*((np)->navigation_type)) :
((void *)0)))
.a...........
a - 1506-226: (S) The second and third operands of the conditional
operator must be of the same type.

The reason for this is that xlc defines NULL as (void *)0, and it does
not allow two different types as the second and third operand of ?:.
The second argument above is not a pointer and the code used NULL
incorrectly as a scalar. NULL is a nil pointer constant in ANSI C and
in some traditional compilers.

You should change NULL in the third argument above to an integer 0.



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