don't crash when using generic props in within statement

modules/mol/base/src/impl/query_impl.cc

@@ -1106,6 +1106,7 @@ Node* QueryImpl::ParseWithinExpr(QueryLexer& lexer) {
     // index of the query for later access.
     QueryImplP q(new QueryImpl(rhs));
     bracketed_expr_.push_back(q);
+    q->gen_prop_list_ = gen_prop_list_;
     ParamType pt(WithinParam(bracketed_expr_.size()-1, rv*rv));    
     inversion_stack_.pop_back();    
     CompOP comp_op= COP_LE;