[RPL/2] Major bug discovered

[BERTRAND Joël]

	Hello,

	I have found a major mistake in all RPL/2 releases :

+++'3-5+4'

1: '3-(5+4)'
+++'3*X-5+4*X'

2: '3-(5+4)'
1: '3*X-(5+4*X)'
+++'X' der

2: '3-(5+4)'
1: -1
+++

	I think that this bug is in analyse_algebrique() subroutine. I will try 
to fix it as soon as possible. The patch will be included in 4.00pre8a.

	Regards,

	JKB