Restricts what accents synthetics can mimic (#10178)

code/modules/mob/living/silicon/silicon.dm

@@ -56,6 +56,9 @@
 	var/obj/item/card/id/id_card
 	var/id_card_type = /obj/item/card/id/synthetic
 
+	var/list/possible_accents = list(ACCENT_TTS, ACCENT_CETI, ACCENT_GIBSON, ACCENT_SOL, ACCENT_LUNA, ACCENT_MARTIAN, ACCENT_VENUS, ACCENT_VENUSJIN, ACCENT_JUPITER, ACCENT_COC, ACCENT_ELYRA, ACCENT_ERIDANI,
+									ACCENT_SILVERSUN, ACCENT_KONYAN, ACCENT_EARTH, ACCENT_REPUBICLANSIIK)
+
 	// Misc
 	uv_intensity = 175 //Lights cast by robots have reduced effect on diona
 	mob_thinks = FALSE

code/modules/mob/living/silicon/silicon_procs.dm

@@ -2,7 +2,7 @@
 	set name = "Mimic Accent"
 	set category = "Subsystems"
 
-	var/chosen_accent = input(src, "Choose an accent to mimic.", "Accent Mimicry") as null|anything in SSrecords.accents
+	var/chosen_accent = input(src, "Choose an accent to mimic.", "Accent Mimicry") as null|anything in possible_accents
 	if(!chosen_accent)
 		return