Fix: non-common fields were not correctly transmitted.
Fix: non-common fields were not correctly transmitted.

This fixes a problem introduced by 73ba889 which stopped setting default "empty" values into the fields map and instead removed non-common fields (so they return nil).
GrahamGoudeau21/tchaik,tchaik/tchaik,tchaik/tchaik,tchaik/tchaik,tchaik/tchaik,GrahamGoudeau21/tchaik,GrahamGoudeau21/tchaik,GrahamGoudeau21/tchaik