[9fans] Small 9pcram update

[Pete Elmore <pete@debu.gs>]

[Hi!  Here's a small update for 9pcram users, which fixes a bug and
cleans up a little.  I've included plain diff and diff -e patches.
They are the same; do not run them both.  Enjoy your free software!  ☺
-Pete]

Mycroftiv is not currently posting on 9fans.  However this is a small
bugfix and cleanup that should be posted for any 9pcram kernel users
who wish it.  Bug finder: Cinap Lenrek.

[Paid placement for diff -e format patch:
Become PHYSICALLY ATTRACTIVE -- overnight!]

gridterm: diff -e /n/ants.9gridchan.org/rootlessnext/src.9.port/devproc.c devproc.c
2020,2021d
2012,2013d
2005,2006d
1973a
		free(cbf);
.
1968,1969d
1960,1962c
			error(Ebadarg);	
.
1956,1957d
1817,1818d

[Paid placement for plain diff patch:
NYES!  The False Prophets, the Conpirators, Them, the Mediocretins, the
stupid Pink Boys, the malignant ones who breathe down our necks and
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everything costs too much, the weather is weird, WHY DID THEY DO IT?
Don't they know they're begging for the flaming sword of Retribution??]

gridterm: diff /n/ants.9gridchan.org/rootlessnext/src.9.port/devproc.c devproc.c
1817,1818d1816
< 			poperror();
< 			return -1;
1956,1957d1953
< 		poperror();
< 		return;
1960,1962c1956
< 			error(Ebadarg);
< 			poperror();
< 			return;		
---
> 			error(Ebadarg);	
1968,1969d1961
< 			poperror();
< 			return;
1973a1966
> 		free(cbf);
2005,2006d1997
< 			poperror();
< 			return;
2012,2013d2002
< 			poperror();
< 			return;
2020,2021d2008
< 			poperror();
< 			return;

[I think it's probably obvious, but "I" below is not me.  -Pete]

NOTES:
The bugfix is the addition of free(cbf) to the return path of the
unmount option from /proc.  Without this, this leaks the buffer and
could eventually exhaust kernel memory if a massive number of unmount
through /proc were performed.  This bug status severity is LOW, and I
won't be uploading recompiled kernels/VMs at this point.

The other is simply cleaning up unreachable code.  When I first wrote
this mod, I completely botched the error handling.  I was confused
between a "stack of error messages" and a "stack of error handling
functions" so I didn't get the waserror() at all.  Cinap Lenrek took
the time to help me understand, so I fixed that but still left
unreachable code stubs.  The removals clean those up.

[Postscript:  Sorry for the paid placements.  Bandwidth costs money.]
[Paid placement for the postscript:
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an orthodox fundadamentalist and a Scatman.  "FUCK THEM IF THEY CAN'T
TAKE A JOKE."]