#5733 Fix various type-conversion warnings

[Dan Eble]

1: int->size_t in make_script_from_event ()
... and similarly in Fingering_engraver::make_script ().
This fixes some warnings.

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

https://codereview.appspot.com/559450053

[Anonymous]

Passes make, make check and a full make doc.

[Anonymous]

Patch on countdown for Feb 8th.

[Anonymous]

Patch counted down - please push.

[Dan Eble]

commit 7362fcde459d888f40523624db9e60cf9a369d48
Author: Dan Eble <nine.fierce.ballads@gmail.com>
Date:   Mon Feb 3 15:08:08 2020 -0500

    Issue 5733/4: int->vsize in Dot_column

    fixes warning

commit e302af56687111bcc2a8db883b2478d8fc642ced
Author: Dan Eble <nine.fierce.ballads@gmail.com>
Date:   Sun Feb 2 15:57:12 2020 -0500

    Issue 5733/3: Fix type-conversion warning in Scale

    Assert that scale size is less than the max int value.

commit 4951c5b23a1ec650476f6a42d3cf335457619094
Author: Dan Eble <nine.fierce.ballads@gmail.com>
Date:   Sat Feb 8 07:01:39 2020 -0500

    Issue 5733/2: Fix scm_from_... () with wrong types

commit 4e9671270e20dac786ab08400218dfc7a5508424
Author: Dan Eble <nine.fierce.ballads@gmail.com>
Date:   Sun Feb 2 14:45:08 2020 -0500

    Issue 5733/1: int->size_t in make_script_from_event ()

    ... and similarly in Fingering_engraver::make_script ().
    This fixes some warnings.