evdaemon: devsn bugfix

opencv-motion-detect/evdaemon.cpp

@@ -943,6 +943,8 @@ public:
             exit(1);
         }
 
+        devSn = info["sn"];
+
         spdlog::info("evdaemon boot \n{}",info.dump());
         string cmd = "hostnamectl set-hostname EVB-" + info["sn"].get<string>();
         system(cmd.c_str());
@@ -958,8 +960,6 @@ public:
             jsonIPs.push_back(k);
         }
 
-        devSn = info["sn"];
-
         char* strEnv = getenv("BOOTSTRAP");
         if(strEnv != nullptr && memcmp(strEnv, "false", 5) == 0) {
             bBootstrap = false;