numpy/numpy — pull request #2933 by seberg (2013-01-19 22:37:28+00:00)
Title: BUG: Fix segfault in np.result_type for None input.

Makes behavior identical to np.dtype(None), which fits to how
the function works.

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This is just a mini fix for a segfault due to `PyArray_DescrConverter2` returning `NULL` for `None`. `PyArray_DescrConverter` does the correct thing for this function.