Fixed bug with empty string, allowing local fonts to be loaded.

assets/games/liminal/prefabs/VNTextbox.xml

@@ -1,5 +1,5 @@
 <prefab name="VNTextbox" type="">
-  <asset type="truetype" name="font_arial" />
+  <asset type="truetype" name="font_main" />
   <asset type="texture" name="texture_border" />
 
   <UIBorder
@@ -22,24 +22,8 @@
       alignY="UI_COMPONENT_ALIGN_MIDDLE"
       ref="uiLabel"
     >
-      <font font="font_arial" size="32">
-        <font>Hello</font><font style="bold"> World
-        </font>
-        <font color="red">How are you today?
-        </font>
-        <font>I'm doing great, thanks!</font>
-        <font>
-          Thanks, me too!
-          Glad to hear it!
-          I'm glad to hear it too!
-          What a great day!
-          It sure is!
-          I'm glad we're friends!
-          Me too!
-          What are you up to?
-          Nothing much, just hanging out.
-          Cool, me too!
-        </font>
+      <font font="font_main" size="32">
+        Hello world!
       </font>
     </UIRichTextLabel>
   </child>