Re-enables sign emote for carbons and fixes signal emote for carbons. Adds finger restrictions to signal emote (#29872)

* re-enables signal emote for carbons

* move checks to signal rather than sign, ceil and floor it, round it

* Update code/modules/mob/living/carbon/human/human_emote.dm

Signed-off-by: Burzah <116982774+Burzah@users.noreply.github.com>

---------

Signed-off-by: Burzah <116982774+Burzah@users.noreply.github.com>
Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>

code/modules/mob/living/carbon/carbon_emote.dm

@@ -140,8 +140,6 @@
 	message = "signs."
 	message_param = "signs the number %t."
 	param_desc = "number(0-10)"
-	// Humans get their own proc since they have fingers
-	mob_type_blacklist_typecache = list(/mob/living/carbon/human)
 	hands_use_check = TRUE
 	target_behavior = EMOTE_TARGET_BHVR_NUM
 

code/modules/mob/living/carbon/human/human_emote.dm

@@ -513,6 +513,19 @@
 	message_param = "raises %t fingers."
 	mob_type_allowed_typecache = list(/mob/living/carbon/human)
 
+/datum/emote/living/carbon/sign/signal/run_emote(mob/user, params, type_override, intentional)
+	var/fingers = round(text2num(params), 1)
+
+	if(fingers > 10)
+		to_chat(user, "<span class='warning'>You don't have enough fingers!</span>")
+		return TRUE
+	else if(fingers < 0)
+		to_chat(user, "<span class='warning'>You're not entirely sure how to raise negative fingers.</span>")
+		return TRUE
+
+	params = fingers
+	return ..()
+
 /////////
 // Species-specific emotes