[Rd] lm.influence doesn't work with na.exclude (PR#1001)

[p.dalgaard@biostat.ku.dk]

The new na.exclude mechanism for linear models does not extend to
influence measures and diagnostics.

For the same reason, the plot method breaks for lm objects computed
with na.action=na.exclude.

x<-1:10
y<-c(rnorm(9),NA)
lm.influence(lm(y~x,na.action=na.exclude))

#Error in lm.influence(lm(y ~ x, na.action = na.exclude)) : 
        NA/NaN/Inf in foreign function call (arg 6)

(This would have been our anniversary #1000 bug report, but some
spammer beat me to it - caught by Martin's filters, I assume)

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907

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