patch 8.2.3481: failures when char is unsigned Commit: https://github.com/vim/vim/commit/2e258bd79f403bcccb1336bea70803957a83808f Author: James McCoy <jamessan@jamessan.com> Date: Tue Oct 5 19:44:04 2021 +0100 patch 8.2.3481: failures when char is unsigned Problem: Failures when char is unsigned. Solution: Use int8_T. Make a CI run with unsigned char. (James McCoy, closes #8936)

| +0#af5f00255#ffffff0@1|1| |1+0#0000000&@4| @65
| +0#af5f00255&@1|2| |1+0#0000000&@3|2| @65
| +8#af5f00255&@1|3| >1+8#0000000&@3|3| @65
| +0#af5f00255&@1|4| |1+0#0000000&@3|4| @65
| +0#af5f00255&@1|5| |1+0#0000000&@3|5| @65
| +0#af5f00255&@1|6| |1+0#0000000&@3|6| @65
| +0#af5f00255&@1|7| |1+0#0000000&@3|7| @65
|:|s|e|t| |n|u|m|b|e|r| |c|u|r|s|o|r|l|i|n|e| |c|u|l|o|p|t|=|b|o|t|h| @22|3|,|1| @10|T|o|p|