fix：解决Gamma default params表有空的value报错问题

jeecg-module-auto-process/src/main/java/org/jeecg/modules/service/impl/GardsGammaDefaultParamsServiceImpl.java

@@ -19,7 +19,7 @@ public class GardsGammaDefaultParamsServiceImpl extends ServiceImpl<GardsGammaDe
     public Map<String, String> mapSetting() {
         Map<String, String> paramsMap = list().stream()
                 .collect(Collectors.toMap(GardsGammaDefaultParams::getName,
-                        GardsGammaDefaultParams::getValue));
+                        v->v.getValue() == null ? "" : v.getValue()));
         return paramsMap;
     }
 }