Unicode for temperature

Change-Id: Ie86dc63f83ae51e9947debc7191fd91d61b83008
diff --git a/gui/devices/800x480/res/ui.xml b/gui/devices/800x480/res/ui.xml
index 12e0ee7..032f996 100644
--- a/gui/devices/800x480/res/ui.xml
+++ b/gui/devices/800x480/res/ui.xml
@@ -276,7 +276,7 @@
 				<conditions>
 					<condition var1="tw_no_cpu_temp" var2="0" />
 				</conditions>
-				<text>CPU: %tw_cpu_temp% C</text>
+				<text>CPU: %tw_cpu_temp% &#xB0;C</text>
 			</object>
 
 			<object type="text" color="%text_color%">