Potential null pointer exception [LUCENE-6626]

[asfimport]

In the file ModifierQueryNode.java, getChild() and getChildren could return null. Checks need to be made for the same to avoid null pointer exceptions.

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Migrated from LUCENE-6626 by Rishabh Patel, updated May 09 2016

[asfimport]

ASF GitHub Bot (migrated from JIRA)

GitHub user rmp91 opened a pull request:

https://github.com/apache/lucene-solr/pull/172

LUCENE-6626: Added checks for null returned by getChild

https://issues.apache.org/jira/browse/LUCENE-6626

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/rmp91/lucene-solr LUCENE-6626

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/lucene-solr/pull/172.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes `#172`

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commit 155c08fdbe97c0197bdec0c2cfcbd95693bd38b5
Author: Rishabh Patel <rishabh.mahendra.patel@gmail.com>
Date: 2015-06-27T04:38:07Z

LUCENE-6626: Added checks for null returned by getChild

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