[Camera] no angle_y defined for underwater.

[ghost]

when working on the harpoon animations, lara can't lock correctly the underwater enemy,
in the code (game_camera.cpp) no angle are defined for y_axis.
so the camera wont rotate (mouse is not used) when lara move at up or down (because in land, lara don't need it !).

• y_angle not working:
  
• lara seeing the underwater enemy:
  
• lara targeting the underwater enemy: