PIAT continues to use empty 3rd person mesh even after reloading

[Matt Hands]

When fired, PIAT switches to empty version of 3rd person mesh. But never switches back to normal mesh after reloading.

NB - 1st person is ok, as the 1st person mesh reload animation uses a notify to call the relevant code.

Have fix, will commit very soon (just working my way through).

[Matt Hands]

Fixed as part of commit a60653e.