This command adds an unsigned integer
to the specified packet. Typically unsigned integers are 4 bytes in
size ranging from 0 to 4,294,967,295.
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.
unsigned int: This is the data to be added.
0 if no error occurred.
-1 if an error occurred.
C++