r.sun: fix -Wimplicit-int warnings

[nilason]

This is a partial, manual backport of #1405.

The warning is treated as an error by Clang 16+ and the compilation fails.

Considering next 7.8 release likely will be the last, this should be a blocker.

[wenzeslaus]

Please, link a PR which is merged. #1405 is closed without merging and this change which comments out code requires at least some explanation.

[nilason]

Please, link a PR which is merged. #1405 is closed without merging and this change which comments out code requires at least some explanation.

That PR was created just before the change to "Squash and merge"-only policy, so I cherry picked and pushed each commit in the PR manually (to keep each fix separate). But you're right about the lack of explanation, I incorporated the original commit message with updates:

r.sun: remove unused function 'cube'

For now only comments out relevant parts.
Addresses -Wimplicit-int compiler warnings.
The warning is treated as an error by Clang 16+ and the compilation fails.

This is a partial, manual backport of #1405,
commit 594c947.

[neteler]

Compilation tested fine with gcc version 12.3.1 on Fedora 37.