put_int16_be
Description:
Writes a signed big endian 16 bit integer to this.
Parameters:
| this | ByteWriter instance | 
| val | Value to write | 
Returns:
| true if the value could be written | 
Writes a signed big endian 16 bit integer to this.
| this | ByteWriter instance | 
| val | Value to write | 
| true if the value could be written |