Fix potential "image is nil" error in [message]

data/lua/wml/message.lua

@@ -24,6 +24,10 @@ local function get_image(cfg, speaker)
 		image = speaker.portrait
 	end
 
+	if image == "none" or image == nil then
+		return "", true
+	end
+
 	if image:find("~RIGHT%(%)") then
 		left_side = false
 		-- The percent signs escape the parentheses for a literal match
@@ -38,10 +42,6 @@ local function get_image(cfg, speaker)
 		image = image:gsub("~LEFT%(%)", "")
 	end
 
-	if image == "none" or image == nil then
-		return "", true
-	end
-
 	return image, left_side
 end