Small fix

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

@@ -388,7 +388,7 @@ public class EntityAccount extends EntityOrder implements Serializable {
         account.ignore_size = json.optBoolean("ignore_size", false);
         account.use_date = json.optBoolean("use_date", false);
         account.use_received = json.optBoolean("use_received", false);
-        account.conditions = json.optString("conditions");
+        account.conditions = json.optString("conditions", null);
 
         return account;
     }

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

@@ -20,6 +20,7 @@ package eu.faircode.email;
 */
 
 import android.os.Bundle;
+import android.text.TextUtils;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -49,7 +50,7 @@ public class TupleAccountNetworkState {
         this.accountState = accountState;
 
         this.jconditions = new JSONObject();
-        if (this.accountState.conditions != null)
+        if (!TextUtils.isEmpty(this.accountState.conditions))
             try {
                 jconditions = new JSONObject(this.accountState.conditions);
             } catch (Throwable ex) {