Refactors how flashes get targets and whatnot, so they no longer work from inside containers to outside. (#34171)

* Flash Refactor

* Update flash.dm

* Update flash.dm

code/modules/mob/living/living_defense.dm

@@ -373,7 +373,8 @@
 	if(get_eye_protection() < intensity && (override_blindness_check || !(has_disability(DISABILITY_BLIND))))
 		overlay_fullscreen("flash", type)
 		addtimer(CALLBACK(src, .proc/clear_fullscreen, "flash", 25), 25)
-		return 1
+		return TRUE
+	return FALSE
 
 //called when the mob receives a loud bang
 /mob/living/proc/soundbang_act()

code/modules/mob/mob_helpers.dm

@@ -323,8 +323,8 @@ It's fairly easy to fix if dealing with single letters but not so much with comp
 /proc/is_blind(A)
 	if(ismob(A))
 		var/mob/B = A
-		return	B.eye_blind
-	return 0
+		return B.eye_blind
+	return FALSE
 
 /mob/proc/hallucinating()
 	return FALSE