Replacing more C-style for loops with the faster, traditional ones. (#62908)

code/game/objects/effects/effect_system/effects_smoke.dm

@@ -24,7 +24,7 @@
 	if(frames == 0)
 		frames = 1 //We will just assume that by 0 frames, the coder meant "during one frame".
 	var/step = alpha / frames
-	for(var/i = 0, i < frames, i++)
+	for(var/i in 1 to frames)
 		alpha -= step
 		if(alpha < 160)
 			set_opacity(0) //if we were blocking view, we aren't now because we're fading out