[PostGIS] #5921: pfree of NULL in gserialized_sel_internal()

[PostGIS]

#5921: pfree of NULL in gserialized_sel_internal()
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  Reporter:  arseniymukhin  |      Owner:  pramsey
      Type:  defect         |     Status:  new
  Priority:  medium         |  Milestone:  PostGIS 3.5.4
 Component:  postgis        |    Version:  master
Resolution:                 |   Keywords:
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Comment (by Paul Ramsey <pramsey@…>):

 In [changeset:"9bd8a0d223e02213d6f6f0c04bbbff6612072306/git"
 9bd8a0d2/git]:
 {{{#!CommitTicketReference repository="git"
 revision="9bd8a0d223e02213d6f6f0c04bbbff6612072306"
 Avoid free when pointer is null. References #5921
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5921#comment:6>
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