Blender Git Loki

Code cleanup: Minor addition to rB254aa8f3a0fbffcbcb886cfaa81b630ae3e9bb78: handle copying of drawflag in ui_but_update_from_old_block()

Note that this is not really needed currently, as the only flag being copied here (UI_BUT_REDALERT) remained in but->flag. However, since we'll have more flags in drawflag now, it's better to explicitly handle this situation...
This func could use some cleanup anyway (a bunch of commented code here)...

Thanks to Campbell for noting this!