==== GetBit ====

Helper function to read the state of a single bit in a byte-buffer.

=== Description ===

<code>GetBit( buffer, bitno )</code>

Get the state of a single bit in a buffer

=== Parameters ===

| ''buf'' | Reference to the byte buffer |
| ''bitno'' | The bit number (0-indexed) |

=== Return value ===

Returns the state of the bit (1 or 0)

=== Example usage ===

<code javascript>    
   new buffer{80};
   new b;
   
   // assuming the buffer is filled with data
   
   b = GetBit(buffer, 18);

   // b is the status of the 19th bit in the buffer
</code>