修复创建数据库没有创建分类表引起的崩溃

main/java/com/hty/browser/DBHelper.java

@@ -31,15 +31,15 @@ public class DBHelper extends SQLiteOpenHelper {
 	public void onCreate(SQLiteDatabase db) {
 		this.db = db;
 		db.execSQL("CREATE TABLE webfav (_id INTEGER PRIMARY KEY , website TEXT, title TEXT, category TEXT)");
+		db.execSQL("CREATE TABLE category (_id INTEGER PRIMARY KEY , category TEXT)");
 	}
 
 	@Override
 	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 		switch (newVersion) {
 		case 3:
-			String sql = "CREATE TABLE category (_id INTEGER PRIMARY KEY , category TEXT)";
-			db.execSQL(sql);
-			sql = "ALTER TABLE " + TableName + " ADD COLUMN category TEXT default ''";
+			db.execSQL("CREATE TABLE category (_id INTEGER PRIMARY KEY , category TEXT)");
+			String sql = "ALTER TABLE " + TableName + " ADD COLUMN category TEXT default ''";
 			db.execSQL(sql);
 			break;
 		}