错误修正 - 数组为null时直接返回level=0

沈斌

2017-01-20 2c36fa5b1a9ebda1bfc049e71e376ee37916507a

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="VcsDirectoryMappings">
    <mapping directory="$PROJECT_DIR$" vcs="Git" />
  </component>
</project>