Fixed [2.1.15] Sea Egg oddness in Deep Sea Zone 3.

Bug 1: Sea Egg randomly gets stuck in DSZ3 by using objectplace. I haven't a clue as to why this happens and I only managed to get it twice... well actually I just managed to catch it while grabbing a GIF of him going through the glass.

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Bug 2: Sea Egg goes through the glass if hit with something such as a Armageddon Shield blast.

Before anyone goes on a wild goose chase hunting for bug #1 and can't figure out why it happens, objectplace reallocates the list of map things when you place an object. Unfortunately, it never actually updates objects' spawnpoints, so they point to freed memory.

It's not a bug in the AI of DSZ's boss. It's also fixed in public next.