涩图模块：修复随机色图不被统计的问题

src/main/java/com/yutou/qqbot/QQBotApplication.java

@@ -6,7 +6,7 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
 public class QQBotApplication {
-    public static final String version="QQBot v.1.2.21";
+    public static final String version="QQBot v.1.2.22";
     public static void main(String[] args) {
         System.out.println("version = " + version);
         SpringApplication.run(QQBotApplication.class, args);

src/main/java/com/yutou/qqbot/models/setu/GetSeTu.java

@@ -92,6 +92,9 @@ public class GetSeTu extends Model {
                 builder.append(new At(qq))
                         .append(":\n");
                 for (String tag : list) {
+                    if(StringUtils.isEmpty(tag)){
+                        tag="随机";
+                    }
                     builder.append(tag).append("\n");
                 }
                 builder.append("------------------\n");