[PHYS-BUG][PLAYER] Swimmers have wrong fall height

[namida]

Already fixed in source code.

Attached level demonstrates it - note that the water's trigger area and the terrain are at the same height, and furthermore, it can be verified in CPM (by mousing over and looking at the pin) that the walkers and swimmers are at the same height before falling. However, the walker survives the fall, while the swimmer does not. Moving the landing platform 1px upwards allows the swimmers to survive.