Merge pull request #7492 from Goober5000/fix/fred_ship_registry #968

Job	Run time
Linux (Debug, clang-16)	10m 21s
Linux (Debug, gcc-13)	4m 44s
Linux (Debug, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	13m 14s
Linux (Release, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	11m 4s
Linux (Debug, gcc-9)	17m 58s
Linux (Release, gcc-13)	7m 45s
Linux (Release, gcc-9)	16m 42s
Linux (Release, clang-16)	16m 57s
	1h 38m 45s

Provide feedback