==== SetCellBit ====

Helper function to set the state of a single bit in a cell value.

=== Description ===

<code>SetCellBit( cell, bitno, value )</code>

Set the state of a single bit in a cell variable

=== Parameters ===

| ''cell'' | The cell variable to manipulate |
| ''bitno'' | The bit number (0-indexed) |
| ''value'' | 0 or 1 (any non-zero value is considered =1) |

=== Return value ===

Returns the state of the bit (1 or 0) before it was set.

=== Example usage ===

<code javascript>    
   new v = 9;  // 9 = binary 1001
   new b;

   b = SetCellBit( v, 2, 1 );
   
   // v is now 13 (binary 1101)
   // b is 0 (previous value of bit 2)
</code>