fix bug with not updating the last line correctly when a group was deleted and recreated (bug 1685312) [backport from HEAD]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45558 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -94,6 +94,7 @@ Major new features in 2.8 release
 All (Unix):
 
 - Handle socket shutdown by the peer correctly in wxSocket (Tim Kosse)
+- Fix bug in wxFileConfig when recreating a group (Steven Van Ingelgem)
 - Added wxString::char_str() and wchar_str() methods for forward
   compatiblity with wxWidgets 3
 

src/common/fileconf.cpp

@@ -1773,7 +1773,7 @@ bool wxFileConfigGroup::DeleteSubgroup(wxFileConfigGroup *pGroup)
 
             m_pLastGroup = NULL;
             for ( wxFileConfigLineList *pl = pLine->Prev();
-                  pl && pl != m_pLine && !m_pLastGroup;
+                  pl && !m_pLastGroup;
                   pl = pl->Prev() )
             {
                 // does this line belong to our subgroup?
@@ -1787,6 +1787,9 @@ bool wxFileConfigGroup::DeleteSubgroup(wxFileConfigGroup *pGroup)
                         break;
                     }
                 }
+
+                if ( pl == m_pLine )
+                    break;
             }
         }