error_code	IN:	HDF error code corresponding to the error
	funct_name	IN:	Name of function in which the error occurred
	file_name	IN:	Name of file in which the error occurred
	line	IN:	Line number in the file that error occurred

	Purpose	Pushes a new error onto the error stack.
	Return value	None.
	Description	HEpush pushes the file name, function name, line number, and generic description of the error onto the error stack. HEreport can then be used to give a more case-specific description of the error.
		If the stack is full, the error is ignored. HEpush assumes that the character strings funct_name and file_name are in semi-permanent storage, so only pointers to the strings are saved.