MAINT get rid of compiler warnings

[larsmans]

Here's a patch from the scikit-learn fork of Liblinear. It doesn't do much, but it shuts up the compiler.

[cjlin1]

We knew this problem but didn't think

double Gnorm1_init = 0.;

is a good thing because some may ask why the initial norm should
be set to zero. Is it better to use

double Gnorm1_init = NULL;

??

Lars Buitinck writes:

Here's a patch from the scikit-learn fork of Liblinear. It doesn't do
much, but it shuts up the compiler.

---

You can merge this Pull Request by running

git pull https://github.com/larsmans/liblinear master

Or view, comment on, or merge it at:

#3

Commit Summary

• MAINT get rid of compiler warnings from Liblinear

File Changes

• M linear.cpp (6)

Patch Links:

• https://github.com/cjlin1/liblinear/pull/3.patch
• https://github.com/cjlin1/liblinear/pull/3.diff

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[larsmans]

NULL is not a valid value for a double because it's a pointer value.

[cjlin1]

Thanks. We plan to use -1 (rather than 0) now.

Lars Buitinck writes:

NULL is not a valid value for a double because it's a pointer value.

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[simsong]

Do you intend to take the pull request?

[wvengen]

Sounds like a good idea, with -1 as an initial value.

[simsong]

This issue was moved to angleto#3