Fix removing a pin in the Seam Allowance tool dialog.

(cherry picked from commit b83fec62bf)

ChangeLog.txt

@@ -91,6 +91,7 @@
 - Fix crash after uniting three pieces in sequence.
 - Incorrect conversion to newer curve format.
 - Elide a variable description in the formula wizard.
+- Fix removing a pin in the Seam Allowance tool dialog.
 
 # Version 0.6.1 October 23, 2018
 - [#885] Regression. Broken support for multi size measurements.

src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp

@@ -3017,7 +3017,7 @@ void DialogSeamAllowance::InitPinPoint(QComboBox *box)
         box->addItem(data->GetGObject(pin)->name(), pin);
     }
 
-    const int index = uiTabPaths->comboBoxNodes->findData(currentId);
+    const int index = box->findData(currentId);
     if (index != -1)
     {
         box->setCurrentIndex(index);