Commit 40f32a47 authored by Carsten Gräser's avatar Carsten Gräser

[!213] Use this pointer for subPreBasis(i) in lambdas [bugfix]

Merge branch 'issue/subprebasis_this' into 'master'


### Summary

Adds the pointer this-> when calling subPreBasis(i) inside of lambdas.

### Details

The recently introduced function subPreBasis(i) that returns the i'th
subPreBasis is used in lambdas without the this-> pointer. This is fine in
recent compilers, but fails in gcc6.

### Discussion

Maybe one should add a test for older compilers in the ci system, to catch
such bugs.

See merge request [staging/dune-functions!213]

parents 84de71c8 b41da74f
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