Unicode for temperature

Change-Id: Ie86dc63f83ae51e9947debc7191fd91d61b83008
diff --git a/gui/devices/320x320/res/ui.xml b/gui/devices/320x320/res/ui.xml
index 1dec405..0918e3b 100644
--- a/gui/devices/320x320/res/ui.xml
+++ b/gui/devices/320x320/res/ui.xml
@@ -264,7 +264,7 @@
 				<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>
 		</template>