[office/tellico] src/gui: Fix compile

Git commit a4e7dc249ff7dc6d7cd0bf2cb9346511d0a44ddf by Robby Stephenson.
Committed on 10/08/2026 at 02:16.
Pushed by rstephenson into branch 'master'.

Fix compile

M  +9    -5    src/gui/linefieldwidget.cpp

https://invent.kde.org/office/tellico/-/commit/a4e7dc249ff7dc6d7cd0bf2cb9346511d0a44ddf

diff --git a/src/gui/linefieldwidget.cpp b/src/gui/linefieldwidget.cpp
index 6e588093e..ff7962463 100644
--- a/src/gui/linefieldwidget.cpp
+++ b/src/gui/linefieldwidget.cpp
@@ -85,11 +85,15 @@ void LineFieldWidget::updateFieldHook(Tellico::Data::FieldPtr, Tellico::Data::Fi
     m_lineEdit->setCompletionObject(nullptr);
   }
 
-  if(newField_->name() == QLatin1StringView("isbn") &&
-    field_->property(QStringLiteral("format")) != QLatin1String("false")) {
-    auto val = new ISBNValidator(this);
-    val->setAllowMultiple(newField_->hasFlag(Data::Field::AllowMultiple));
-    m_lineEdit->setValidator(val);
+  // name wom't change but property might
+  if(newField_->name() == QLatin1StringView("isbn")) {
+    if(newField_->property(QStringLiteral("format")) == QLatin1StringView("false")) {
+      m_lineEdit->setValidator(nullptr);
+    } else {
+      auto val = new ISBNValidator(this);
+      val->setAllowMultiple(newField_->hasFlag(Data::Field::AllowMultiple));
+      m_lineEdit->setValidator(val);
+    }
   }
 }