headernt.c: fix segmentation fault when runtime not found #12726
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dra27
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Nov 10, 2023
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dra27
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The MSDN documentation for SearchPathW doesn't make it explicit that NULL can be passed, but it does list lpFilePart as being optional.
I wonder whether in the past it wasn't quite this optional, but I ran this PR locally (on Windows 10) and it appears to behave as expected.
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Fixes a segmentation fault under Windows when the runtime (
ocamlrun.exe) is not found in the PATH.The bug and the fix were identified by @vadim-z. @dra27 had a similar fix in one of his working branches as well.
Fixes #12722