include: fix IS_ERR on Windows

[petrutlucian94]

include: fix IS_ERR on Windows

The "long" type uses 32b on x64 Windows platforms, which means
it's not large enough to store a pointer. intptr_t or uintptr_t
should be used instead.

This change fixes include/err.h, using the right types. There was
a previous patch on this topic but unfortunately it didn't address
all the type casts.

This issue was brought up by the unittest_crush test, which recently
started to fail as the CrushWrapper methods use IS_ERR.

Fixes: https://tracker.ceph.com/issues/57308
Signed-off-by: Lucian Petrut lpetrut@cloudbasesolutions.com

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[petrutlucian94]

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[idryomov]

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[petrutlucian94]

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[petrutlucian94]

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[petrutlucian94]

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[idryomov]

@djgalloway FWIW this had a pending needs-qa label and should not have been merged over it. Despite "on Windows" in the title, it changed the type for all platforms and, however trivial, it is better to run such things through at least one of the suites first.