don't call SetInsertionPointEnd() on a read-only combobox (patch 1828963)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49782 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/grid.cpp

@@ -1560,8 +1560,9 @@ void wxGridCellChoiceEditor::BeginEdit(int row, int col, wxGrid* grid)
     if (m_allowOthers)
     {
         Combo()->SetValue(m_startValue);
+        Combo()->SetInsertionPointEnd();
     }
-    else
+    else // the combobox is read-only
     {
         // find the right position, or default to the first if not found
         int pos = Combo()->FindString(m_startValue);
@@ -1570,7 +1571,6 @@ void wxGridCellChoiceEditor::BeginEdit(int row, int col, wxGrid* grid)
         Combo()->SetSelection(pos);
     }
 
-    Combo()->SetInsertionPointEnd();
     Combo()->SetFocus();
 
     if (evtHandler)