Further drawBomp() cleanups
|Reported by:||eriktorbjorn||Owned by:||aquadran|
This patch further cleans up the new drawBomp() implementation. It removes one theoretical - but extremely unlikely - memory leak, slightly optimizes the image scaling, and removes the floating-point math from the blending function.
There are still some FIXMEs, and some places in the code - e.g. drawBlastObject() - which assume that drawBomp() can't scale images, but this shouldn't cause any visible harm.
Ticket imported from: #610954. Ticket imported from: patches/160.