bugfix (#36)

* 使用本地漏洞库时报空指针错误

* Update vuln samples in readme

* Update vuln samples in readme

Co-authored-by: huyongfeng <[email protected]>

Author: itxiaohu001

.github/README.md

@@ -113,8 +113,7 @@ opensca-cli -db db.json -path ${project_path}
     "release_date": "2021-12-10",
     "security_level_id": 1,
     "exploit_level_id": 1
-  },
-  {}
+  }
 ]
 ```
 

README.md

@@ -112,8 +112,7 @@ opensca-cli -db db.json -path ${project_path}
     "release_date": "2021-12-10",
     "security_level_id": 1,
     "exploit_level_id": 1
-  },
-  {}
+  }
 ]
 ```
 

util/vuln/local.go

@@ -36,8 +36,14 @@ func loadVulnDB() {
 		} else {
 			// 解析本地漏洞
 			db := []vulnInfo{}
-			json.Unmarshal(data, &db)
+			err := json.Unmarshal(data, &db)
+			if err != nil {
+				logs.Error(err)
+			}
 			for _, info := range db {
+				if info.Vuln == nil {
+					continue
+				}
 				// 有中文描述则省略英文描述
 				if info.Description != "" {
 					info.DescriptionEn = ""