[MINOR] Avoid NPE when native lib is not found #668
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Which issue does this PR close?
minor fix,
createResourceshould not return nullhttps://github.com/apache/spark/blob/4eed18455332164e63e58bbd8e828ebb9639143c/common/utils/src/main/scala/org/apache/spark/util/SparkErrorUtils.scala#L46-L49
Rationale for this change
What changes are included in this PR?
Are there any user-facing changes?