Fix crash after using tool Union of details.

ChangeLog.txt

@@ -31,6 +31,7 @@
 - Piece labels line break.
 - Support for single-line fonts.
 - Export to HP-GL format.
+- Fix crash after using tool Union of details.
 
 # Valentina 0.7.52 September 12, 2022
 - Fix crash when default locale is ru.

src/libs/vtools/dialogs/tools/dialoguniondetails.cpp

@@ -85,6 +85,11 @@ void DialogUnionDetails::ChosenObject(quint32 id, const SceneObject &type)
     }
     else
     {
+        if (d1 == id)
+        {
+            emit ToolTip(tr("Select unique detail"));
+            return;
+        }
         ChoosedDetail(id, type, d2, indexD2);
     }
 }