[PostGIS] #6048: postgis_raster crashes in rt_band_set_pixel due to NULL band pointer during ST_Clip operation

[PostGIS]

#6048: postgis_raster crashes in rt_band_set_pixel due to NULL band pointer during
ST_Clip operation
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  Reporter:  maxmli  |      Owner:  robe
      Type:  defect  |     Status:  new
  Priority:  medium  |  Milestone:  PostGIS 3.7.0
 Component:  raster  |    Version:  master
Resolution:          |   Keywords:
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Changes (by maxmli):

 * version:  3.6.x => master

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6048#comment:1>
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