Fix missing null check that somehow only gcc-arm64 sees

Author: rgriebl

src/desktop/betteritemdelegate.cpp

@@ -14,10 +14,8 @@ BetterItemDelegate::BetterItemDelegate(Options options, QAbstractItemView *paren
     : QStyledItemDelegate(parent)
     , m_options(options)
 {
-    if (m_options.testFlag(Pinnable)) {
-        Q_ASSERT(parent);
+    if (m_options.testFlag(Pinnable) && parent)
         parent->setProperty("pinnableItems", true);
-    }
 }
 
 void BetterItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,