Bug#973005: inventor: please enable builds on sparc64 and riscv64

[Graham Inggs]

Control: tags -1 + patch

Attached is a patch which replaces the long string of comparisons with
 __SIZEOF_LONG__, i.e.

-#if (_MIPS_SZPTR == 64 || __ia64 || __x86_64 || __alpha__ ||
__powerpc64__ || __s390x__ || __aarch64__)
+#if (__SIZEOF_LONG__ == 8)

I've uploaded inventor with this patch to Ubuntu and it built fine on
all architectures there [1], including riscv64.


[1] https://launchpad.net/ubuntu/+source/inventor/2.1.5-10-23ubuntu1
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