Fix crash when creating preview cache table
diff --git a/src/com/android/launcher2/WidgetPreviewLoader.java b/src/com/android/launcher2/WidgetPreviewLoader.java
index a9bc098..7c1b678 100644
--- a/src/com/android/launcher2/WidgetPreviewLoader.java
+++ b/src/com/android/launcher2/WidgetPreviewLoader.java
@@ -274,7 +274,7 @@
                     COLUMN_SIZE + " TEXT NOT NULL, " +
                     COLUMN_PREVIEW_BITMAP + " BLOB NOT NULL, " +
                     "PRIMARY KEY (" + COLUMN_NAME + ", " + COLUMN_SIZE + ") " +
-                    ");");
+                    ") IF NOT EXISTS;");
         }
 
         @Override