Changes some 1s and 0s to TRUE and FALSE (#1967)

code/game/objects/items/devices/megaphone.dm

@@ -6,7 +6,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	siemens_coefficient = 1
 	var/spamcheck = 0
-	var/emagged = 0
+	var/emagged = FALSE
 	var/list/voicespan = list(SPAN_COMMAND)
 
 /obj/item/device/megaphone/get_held_item_speechspans(mob/living/carbon/user)
@@ -19,7 +19,7 @@
 
 /obj/item/device/megaphone/emag_act(mob/user)
 	to_chat(user, "<span class='warning'>You overload \the [src]'s voice synthesizer.</span>")
-	emagged = 1
+	emagged = TRUE
 	voicespan = list(SPAN_REALLYBIG, "userdanger")
 
 /obj/item/device/megaphone/sec