unit_carrier_drones.lua: fix a case of crash when 2nd drone was destroyed immediately after its nanoframe is created.

Happen because UpdateCoroutine() accidentally skipped 1 frame when 2nd drone was created. This skipped frame give some chance for NIL to pass.
Can happen by burning Armcarry when it spawn 2 drone in succession.
CrudePlayerList & DeluxePlayerList: remove a check added in https://github.com/ZeroK-RTS/Zero-K/commit/36eb7e3372fba37594d9e9e29bfcb5919e41e0ad which is not needed (Chili already not steal mousewheel if no scrollbar is present)

unit_carrier_drones.lua: fix a case of crash when 2nd drone was destroyed immediately after its nanoframe is created.

Happen because UpdateCoroutine() accidentally skipped 1 frame when 2nd drone was created. This skipped frame give some chance for NIL to pass.
Can happen by burning Armcarry when it spawn 2 drone in succession.

CrudePlayerList & DeluxePlayerList: remove a check added in https://github.com/ZeroK-RTS/Zero-K/commit/36eb7e3372fba37594d9e9e29bfcb5919e41e0ad which is not needed (Chili already not steal mousewheel if no scrollbar is present)

Merge branch 'carrier_drone_crash' of https://github.com/xponen/Zero-K into carrier_drone_crash