intptr fixes for the testsuite

[Bernd Schmidt <bernds at codesourcery dot com>]

I'm working on a target where intptr_t and pointers are larger than
size_t and ptrdiff_t. The testsuite has problems in this area, since we
often use the latter two types for casting from/to pointers, leading to
unwanted warnings. In some cases I've checked the corresponding PRs and
found that the original testcases used something like plain int or long.

The following is a first pass to eliminate some of these problems.
Tested on i686-linux. Ok?


Bernd

Attachment: ts-intptr.diff
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