throw exception if no supported logo location is found
diff --git a/src/org/linaro/wallpaper/LogoWallpaper.java b/src/org/linaro/wallpaper/LogoWallpaper.java
index ec32399..c7580ca 100644
--- a/src/org/linaro/wallpaper/LogoWallpaper.java
+++ b/src/org/linaro/wallpaper/LogoWallpaper.java
@@ -277,6 +277,8 @@
 				initAnimationBL(width, height, density, d, w);
 			else if("Bottom-Right".equals(mLocation))
 				initAnimationBR(width, height, density, d, w);
+			else
+				throw new RuntimeException("unknown logo location: " + mLocation);
 		}
 
 		@Override