[PostGIS] #5839: Does not comile with postgres 18

[PostGIS]

#5839: Does not comile with postgres 18
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 Reporter:  RekGRpth  |      Owner:  pramsey
     Type:  defect    |     Status:  new
 Priority:  medium    |  Milestone:
Component:  postgis   |    Version:  master
 Keywords:            |
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 Commit
 https://github.com/postgres/postgres/commit/d4a43b283751b23d32bbfa1ecc2cad2d16e3dde9
 converts libpgport's pqsignal() to a void function.

 {{{
 #9 371.9 postgis_module.c: In function '_PG_init':
 #9 371.9 postgis_module.c:83:18: error: void value not ignored as it ought
 to be
 #9 371.9    83 |   coreIntHandler = pqsignal(SIGINT, handleInterrupt);
 #9 371.9       |                  ^
 #9 371.9 make[1]: *** [<builtin>: postgis_module.o] Error 1
 #9 371.9 make[1]: *** Waiting for unfinished jobs....
 #9 372.2 make: *** [GNUmakefile:36: all] Error 1
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5839>
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