fix(h5): hbx signal log

packages/uni-cli-shared/src/hbx/log.ts

@@ -10,11 +10,13 @@ export const h5ServeFormatter: Formatter = {
     if (msg.includes(SIGNAL_H5_NETWORK)) {
       networkLogs.push(msg)
       process.nextTick(() => {
-        // 延迟打印所有 network,仅最后一个 network 替换 > 为 -，通知 hbx
-        const len = networkLogs.length - 1
-        networkLogs[len] = networkLogs[len].replace('>', '-')
-        console.log(networkLogs.join('\n'))
-        networkLogs.length = 0
+        if (networkLogs.length) {
+          // 延迟打印所有 network,仅最后一个 network 替换 > 为 -，通知 hbx
+          const len = networkLogs.length - 1
+          networkLogs[len] = networkLogs[len].replace('>', '-')
+          console.log(networkLogs.join('\n'))
+          networkLogs.length = 0
+        }
       })
       return ''
     }