lbfgs: fix check_work #6
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I got this error, which doesn't make sense because 2 is <= 2:
```
Fatal error: exception Failure("Lbfgs.min: dim of work too small for problem size n = 2, valid n <= 2")
```
iwa is allocated as 3*n, and upstream L-BFGS-ocaml checks for 3*n too,
the check against 3*corrections seems to be a typo, looking at lbfgsb.f
says '3*nmax' and the code has `iwa.(2*n+1)` so clearly related to 'n'
and not 'corrections'.
Signed-off-by: Edwin Török <edwin@etorok.net>
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I got this error, which doesn't make sense because 2 is <= 2:
iwa is allocated as 3n, and upstream L-BFGS-ocaml checks for 3n too, the check against 3corrections seems to be a typo, looking at lbfgsb.f says '3nmax' and the code has
iwa.(2*n+1)so clearly related to 'n' and not 'corrections'.