cppCheck redundantAssignment pParseNode

Change-Id: I0e5e2d607bddd1f73fc8c256169a2fbe070f6448
Reviewed-on: https://gerrit.libreoffice.org/63256
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

dbaccess/source/ui/querydesign/SelectionBrowseBox.cxx

@@ -662,9 +662,8 @@ bool OSelectionBrowseBox::saveField(OUString& _sFieldName ,OTableFieldDescRef co
     ::connectivity::OSQLParser& rParser( rController.getParser() );
     {
         // automatically add parentheses around subqueries
-        OSQLParseNode *pParseNode = nullptr;
         OUString devnull;
-        pParseNode = rParser.parseTree( devnull, _sFieldName, true );
+        OSQLParseNode *pParseNode = rParser.parseTree( devnull, _sFieldName, true );
         if (pParseNode == nullptr)
             pParseNode = rParser.parseTree( devnull, _sFieldName );
         if (pParseNode != nullptr && SQL_ISRULE(pParseNode, select_statement))