Handle PLOKAMI capture and reader errors.

[hbock]

It'd be a good idea to implement restarts in this case.

2008-12-31 20:00: === BEGIN PROCESSING SESSION 3439758600 [2008-12-31 19:30] ===
2008-12-31 20:00: Report [30-minute]

debugger invoked on a PLOKAMI:CAPTURE-FILE-ERROR in thread #<THREAD "initial thread" RUNNING {100415AEF1}>:
  truncated dump file; tried to read 54 captured bytes, only got 8

Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.

(no restarts: If you didn't do this on purpose, please report it as a bug.)

((SB-PCL::FAST-METHOD PLOKAMI:CAPTURE (PLOKAMI::PCAP-READER T T))
 #(5 NIL 7 NIL 0 NIL)
 #<unavailable argument>
 #<PLOKAMI::PCAP-READER {100A40DD01}>
 -1
 #<CLOSURE (LAMBDA #) {100A40FFC9}>)

[hbock]

Done. See 75ab7f6cea8b79b15f08e7b54e3d14a3fdc0ca91.