Readded acceleration in stage 3 of StarburstLauncher.

[GoogleFrog]

The behaviour should not have been changed without reason. The change broke the timing and feel of a few weapons.

[ashdnazg]

Personally I agree, but since jK changed it, it's up to him.

[Anarchid]

Simply adding acceleration back will make Impaler have effective minimal range of half its maximum range, and probably affect other cruise missiles as well.

There has been a refactor of starburst launcher, with the acceleration removal commit being a hotfix for inadvertently changed functionality causing the abovementioned minimum range issue.

It should also be possible to fix this game-side by increasing missile turnrate, if acceleration happens again.

[GoogleFrog]

No it won't Anarchid. StarburstLauncher used to accelerate in stages 1 and 3. I compiled and tested this PR.

[silentwings]

+1 to this PR, my reponse:

[21:27:15] <[Fx]Bluestone> starburst launchers didn't travel fast enough somehow
[21:27:20] <[Fx]Bluestone> looked like no acceleration
[21:27:30] ah
[21:27:38] #210 (comment)
[21:27:51] convince jK to accept the PR
[21:27:55] <[Fx]Bluestone> oO wtf
[21:28:12] <[Fx]Bluestone> something was broken and now we have to convince the person who broke it not to break it?!