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// Description: Find the closing ") in a string, given a start position
//						AFTER the opening "(".
// 
// parameters : as_source_string - the whole string
//					 ai_start_position - a position AFTER the opening "("
//	returns    : position of closing ")", 0 if there is none
//
//	Example:		gf_find_closing_parenthesis ("(aa(bb),cc)",  3 )
//                                                     |
//					will return  11  -------------------------+
//
// Date		Name		Description
// --------	-------- ------------------------------
//  12 / 06 / 2001  Michael		Creation
//  31 / 12 / 2001  Michael		Change from int to long
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