TestCacheEviction fails on 32-bit architectures.

[skogtwin]

Thanks for the fix! Unfortunately it looks like something else is amiss here. If I apply that patch I don't get the segfault anymore, but the test still fails:

      testing: github.com/facebookincubator/nvdtools
github.com/facebookincubator/nvdtools/cmd/cpe2cve
PASS
ok  	github.com/facebookincubator/nvdtools/cmd/cpe2cve	0.008s
github.com/facebookincubator/nvdtools/cmd/csv2cpe
PASS
ok  	github.com/facebookincubator/nvdtools/cmd/csv2cpe	0.005s
github.com/facebookincubator/nvdtools/cmd/redhat_filter
PASS
ok  	github.com/facebookincubator/nvdtools/cmd/redhat_filter	0.005s
github.com/facebookincubator/nvdtools/cmd/rpm2cpe
PASS
ok  	github.com/facebookincubator/nvdtools/cmd/rpm2cpe	0.004s
github.com/facebookincubator/nvdtools/cmd/wfnconvert
PASS
ok  	github.com/facebookincubator/nvdtools/cmd/wfnconvert	0.005s
github.com/facebookincubator/nvdtools/cpedict
PASS
ok  	github.com/facebookincubator/nvdtools/cpedict	0.006s
github.com/facebookincubator/nvdtools/cvefeed
--- FAIL: TestCacheEviction (0.00s)
    eviction_test.go:64: concurrent run: cache size 1758/2048; 2 records cached
    eviction_test.go:91: sequential run #1: more than 1 record cached (2)
    eviction_test.go:93: sequential run #1: cache size 2046/2048; 2 records cached
    eviction_test.go:122: sequentual run #2: cache size 1704/2048; 8 records cached
FAIL
exit status 1
FAIL	github.com/facebookincubator/nvdtools/cvefeed	0.022s

Full build output is at https://kojipkgs.fedoraproject.org//work/tasks/6747/58936747/build.log for i686, https://koji.fedoraproject.org/koji/taskinfo?taskID=58936690 is the build task with all platforms.

Originally posted by @davide125 in #167 (comment)

[skogtwin]

Cache capacity in records is hard-coded in the test. Since the record is smaller on 32-bit archs, the test fails.