Issue 5733: Fix various type-conversion warnings

https://sourceforge.net/p/testlilyissues/issues/5733/

1: int->size_t in make_script_from_event ()
... and similarly in Fingering_engraver::make_script ().

2: Fix scm_from_... () with wrong types

3: Fix type-conversion warning in Scale
Assert that scale size is less than the max int value.

4: int->vsize in Dot_column

[lemzwerg, 2020-02-04 10:45:58]

LGTM

https://codereview.appspot.com/559450053/diff/547570044/lily/accidental-place...
File lily/accidental-placement.cc (right):

https://codereview.appspot.com/559450053/diff/547570044/lily/accidental-place...
lily/accidental-placement.cc:62: scm_from_long  (stagger ? context_hash : 1));
Are you actually trying clang-format?  There's one space too much :-)

[Dan Eble, 2020-02-04 14:37:43]

On 2020/02/04 10:45:58, lemzwerg wrote:
> lily/accidental-placement.cc:62: scm_from_long  (stagger ? context_hash : 1));
> Are you actually trying clang-format?  There's one space too much :-)

I was too lazy to deal with Han-Wen's config file as a patch.  Now that it's in
master, I plan to try it.

[Dan Eble, 2020-02-04 19:35:08]

run git-clang-format