Use better temporary file names
commit2d965af16af93b89cde1b761eaa503fe54c7373f
authorOlly Betts <olly@survex.com>
Wed, 7 Feb 2024 02:51:00 +0000 (7 15:51 +1300)
committerOlly Betts <olly@survex.com>
Wed, 7 Feb 2024 02:51:00 +0000 (7 15:51 +1300)
tree2f4de5c19c2ce050c6ed3945751d6771f2339182
parentb1c66e132f4b85b166c7b2db4314dc3189b8f2ad
Use better temporary file names

We weren't setting `t` before, so the temporary files used were
named `.pbm`, etc.
lib/icons/xpm2png