Tests error on 32 bits arches

[eclipseo]

Golang 1.12.6 on i686 and armv7

Testing    in: /builddir/build/BUILD/treeprint-a009c3971eca89777614839eb7f69abed3ea3959/_build/src
         PATH: /builddir/build/BUILD/treeprint-a009c3971eca89777614839eb7f69abed3ea3959/_build/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin
       GOPATH: /builddir/build/BUILD/treeprint-a009c3971eca89777614839eb7f69abed3ea3959/_build:/usr/share/gocode
  GO111MODULE: off
      command: go test -buildmode pie -compiler gc -ldflags "-X github.com/xlab/treeprint/version.commit=a009c3971eca89777614839eb7f69abed3ea3959 -X github.com/xlab/treeprint/version=0 -extldflags '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld '"
      testing: github.com/xlab/treeprint
github.com/xlab/treeprint
--- FAIL: TestFromStructTypeSize (0.00s)
    struct_test.go:115: 
            Error Trace:    struct_test.go:115
            Error:          Not equal: 
                            expected: ".\n├── [16]  one\n├── [8]  two\n└── [72]  Three\n    ├── [24]  SubOne\n    ├── [24]  SubTwo\n    └── [24]  SubThree\n        └── [8]  inner_three\n"
                            actual  : ".\n├── [8]  one\n├── [4]  two\n└── [36]  Three\n    ├── [12]  SubOne\n    ├── [12]  SubTwo\n    └── [12]  SubThree\n        └── [8]  inner_three\n"

                            Diff:
                            --- Expected
                            +++ Actual
                            @@ -1,8 +1,8 @@
                             .
                            -├── [16]  one
                            -├── [8]  two
                            -└── [72]  Three
                            -    ├── [24]  SubOne
                            -    ├── [24]  SubTwo
                            -    └── [24]  SubThree
                            +├── [8]  one
                            +├── [4]  two
                            +└── [36]  Three
                            +    ├── [12]  SubOne
                            +    ├── [12]  SubTwo
                            +    └── [12]  SubThree
                                     └── [8]  inner_three
            Test:           TestFromStructTypeSize
FAIL
exit status 1
FAIL    github.com/xlab/treeprint   0.009s

[xlab]

le fu :)

I'll try to use something platform-independent here..