Fixed finding attachments

app/src/main/java/eu/faircode/email/DB.java

@@ -51,7 +51,7 @@ import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 83,
+        version = 85,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -818,6 +818,20 @@ public abstract class DB extends RoomDatabase {
                         db.execSQL("ALTER TABLE `message` ADD COLUMN `color` INTEGER");
                     }
                 })
+                .addMigrations(new Migration(83, 84) {
+                    @Override
+                    public void migrate(SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("UPDATE attachment SET disposition = lower(disposition) WHERE NOT disposition IS NULL");
+                    }
+                })
+                .addMigrations(new Migration(84, 85) {
+                    @Override
+                    public void migrate(SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("UPDATE attachment SET size = NULL WHERE size = 0");
+                    }
+                })
                 .build();
     }
 

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -986,6 +986,8 @@ public class MessageHelper {
                 String disposition;
                 try {
                     disposition = part.getDisposition();
+                    if (disposition != null)
+                        disposition = disposition.toLowerCase();
                 } catch (MessagingException ex) {
                     Log.w(ex);
                     parts.warnings.add(Helper.formatThrowable(ex));
@@ -1061,7 +1063,7 @@ public class MessageHelper {
                         }
                     }
 
-                    if (apart.attachment.size < 0)
+                    if (apart.attachment.size <= 0)
                         apart.attachment.size = null;
 
                     // https://tools.ietf.org/html/rfc2392