Merge branch 'uncapped-captions' into 'master'

uncapped: Update closed captions only on new tics

See merge request KartKrew/Kart!729

src/d_main.c

@@ -875,7 +875,8 @@ void D_SRB2Loop(void)
 
 		// consoleplayer -> displayplayers (hear sounds from viewpoint)
 		S_UpdateSounds(); // move positional sounds
-		S_UpdateClosedCaptions();
+		if (realtics > 0 || singletics)
+			S_UpdateClosedCaptions();
 
 #ifdef HW3SOUND
 		HW3S_EndFrameUpdate();