[PostGIS] #4678: Rewrite all raster callback functions in C

[PostGIS]

#4678: Rewrite all raster callback functions in C
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  Reporter:  robe    |      Owner:  dustymugs
      Type:  defect  |     Status:  closed
  Priority:  medium  |  Milestone:  PostGIS 3.7.0
 Component:  raster  |    Version:  master
Resolution:  fixed   |   Keywords:
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Changes (by komzpa):

 * milestone:  PostGIS Fund Me => PostGIS 3.7.0

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4678#comment:3>
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