This command adds a short integer to
the specified packet. Typically short integers are 2 bytes in size ranging
from -32,768 to +32,767.
The data will be added starting at the cursor position and the cursor will be moved forward by the size of the data added.
long long int Packet: This is the packet that the command should use.
short integer: This is the data to be added.
0 if no error occurred.
-1 if an error occurred.
C++