[BUG] ls-files showing deleted files (unchecked lstat return value)

[Joe Ranieri <jranieri@xxxxxxxxxxxxxx>]

"git ls-files -m" can show deleted files, despite -d not having been 
specified. This is due to ls-files.c's show_files function calling lstat 
but not checking the return value before calling ie_modified with the 
uninitialized stat structure.

This problem was found using the static analysis tool GrammaTech CodeSonar.

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Thanks and Regards,
Joe Ranieri
Software Engineer
GrammaTech, Inc.