Fix "Detect missions that are missing .start.assign_mission_target.om_special" errors #79428

Job	Run time
skip-duplicates-code	8s
skip-duplicates-code	8s
skip-duplicates-data	8s
skip-duplicates-data	8s
matrix-variables	1s
matrix-variables	1s
Basic Build and Test (Clang 10, Ubuntu, Curses)	16m 28s
Basic Build and Test (Clang 10, Ubuntu, Curses)	16m 28s
Clang 14, macOS 12, Tiles, Sound, x64 and arm64 Universal Binary	29m 0s
Clang 14, macOS 12, Tiles, Sound, x64 and arm64 Universal Binary	20m 53s
GCC 9, Curses, LTO	1s
GCC 9, Curses, LTO	19m 18s
Clang 12, Ubuntu, Tiles, ASan	1s
Clang 12, Ubuntu, Tiles, ASan	1h 10m 46s
GCC 11, Ubuntu, Curses, ASan	1s
GCC 11, Ubuntu, Curses, ASan	1h 31m 32s
GCC 12, Ubuntu cross-compile to MinGW-Win64, Tiles, Sound	1s
GCC 12, Ubuntu cross-compile to MinGW-Win64, Tiles, Sound	39m 6s
GCC 9, Ubuntu, Tiles, Sound, CMake	1s
GCC 9, Ubuntu, Tiles, Sound, CMake	11m 41s
	5h 15m 51s

Provide feedback