Segfault in the 2.0.0 installer

[Matthew Dillon]

:OK, I tracked it down to an off-by-one that was probably corrupting
:malloc internals.
:
:A quick grep through the code found the same issue in other files
:(looks like copy and paste).
:
:Diff inline below.
:
:Pierre Riteau

    Excellent sleuthing!  We'll get these patches committed ASAP.

    This is also a dividend of the easier access to the installer sources
    we got when Dave Hayes ported it into the base system bulid.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>