Fixed BasicTypes preproc checks for pointer type

[vietjtnguyen]

Originating Project/Creator	CADRE
Affected Component	n/a
Affected Architectures(s)
Related Issue(s)
Has Unit Tests (y/n)	n/a
Builds Without Errors (y/n)	y
Unit Tests Pass (y/n)	n/a
Documentation Included (y/n)	n/a

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Change Description

Changes the preprocessor checks for defining the POINTER_CAST type so that they're acceptable by the compiler even if the expected architecture-dependent definitions are not present.

Rationale

When built in the CADRE cross compilation environment with -Werror enabled this produces compilation errors pertaining to checking against undefined preprocessor variables (the originating warning was -Wundef if I remember correctly).

Testing/Review Recommendations

Test against software built against architectures covered by these different preprocessor definitions that are checked.

Future Work

n/a

[LeStarch]

All the changes do is to add a "is defined" check before checking values. I am ok with this change.