Sprites don't initialize PixelsPerUnrealUnit in cooked builds, causing invalid values for GetSocketLocation, etc... for assets that have Pixels/uu of 2.56

In this user's project, playing in Launched or Packaged games causes the Get Socket Location to return an unusual report when used during a flipbook animation. Instead of a normal vector, the Print String reads: "X=-1.#10 Y=-1.#10 Z=-1.#10". This only occurs in a Launched or Packaged game; PIE shows the expected vector.

The setup for this is in the MyCharacter BP, commented in Yellow for easy reference.

Reproduced in 4.6.1 binary and Main (CL-2408355).

1. Open the user's project
2. Launch Game
3. Press 'J'

Results:
The vector output of Get Socket Location reads, "X=-1.#10 Y=-1.#10 Z=-1.#10" instead of a usable vector