修正空库下appmodels为空的bug

ibzwf-core/src/main/java/cn/ibizlab/core/workflow/extensions/service/WFCoreService.java

@@ -707,6 +707,8 @@ public class WFCoreService
 					appdef.setLastUpdated(newModel.getLastUpdated());
 					appdef.setLastUpdatedBy(newModel.getLastUpdatedBy());
 					appdef.setDescription(newModel.getDescription());
+					if(appModel.getDefinition()!=null&&appModel.getDefinition().getModels()==null)
+						appModel.getDefinition().setModels(new ArrayList<>());
 					appModel.getDefinition().getModels().add(appdef);
 					bchange=true;
 				}