renderer: skip unhandled marksurfaces when calculating leaf bounds

BSP flares in leafs cause surfaces after it not to be added to bounds
(surfMins and surfMaxs) used by dlight culling code.

continue is run, but mark++ is not. This causes the flare to be checked
again instead of the the next surface.
client: Don't mix sfx with NULL soundData 
Caused a crash. Already done for looping sounds.
ui: added multisample option
misc: updated with spyhawk changes
ui: changed name to more common
tinygettext: FreeBSD build fix. iconv is included in libc starting from
version 10.0. - patch by gaoesa
Merge pull request #84 from zturtleman/surface_bounds

renderer: skip unhandled marksurfaces when calculating leaf bounds
misc: uncrustify
Merge branch 'master' of https://github.com/etlegacy/etlegacy.git
misc: update for translation files
renderer2: uncrustify
qcommon: added Q_isanumber, uncrustify
misc: update for translation files
renderercommon: don't register same font more than once fixes #530
game: fixed GetEntityOwner in bot code - patch by OB team refs #434
Omnibot: 0.83 merge refs #434 - patch by Palota/OB team
misc: legacy.cfg - default config value for g_ip_max_clients set to 0
misc: update translate files
cgame: support ogg for map end sounds
game: Granatwerfer no ammo event fix