cycle weapons backwards misses out newer weapons

[VoxelStorm Bug Submitter]

Submitted by Norgg from IRC (~norgg on norgg.org)

[Norgg]

Fix cycle weapons backwards unsigned int modulo error (fixes #110). Move self destruct into ship update (actually fixes #93).

→ <<cset 2ff0e1a5e481>>

[Riot]

Merge branch 'master' of https://[e-mail]/voxelstorm/sphereface.git

By John Turner

Via John Turner

• 'master' of https://[e-mail]/voxelstorm/sphereface.git: Move AI base function into ship::base and add a speed limit to powerups. Fix cycle weapons backwards unsigned int modulo error (fixes #110). Move self destruct into ship update (actually fixes #93).

Conflicts: version.h

→ <<cset ff45da28e406>>