eve: check redis reply in non pipeline mode

We may lose the reply if disconnection happens.
Reconnection is needed.

src/util-logopenfile.c

@@ -597,6 +597,8 @@ static int  LogFileWriteRedis(LogFileCtx *file_ctx, const char *string, size_t s
                 file_ctx->redis_setup.key,
                 string);
 
+        /*  We may lose the reply if disconnection happens! */
+        if (reply) {
             switch (reply->type) {
                 case REDIS_REPLY_ERROR:
                     SCLogWarning(SC_ERR_SOCKET, "Redis error: %s", reply->str);
@@ -612,6 +614,9 @@ static int  LogFileWriteRedis(LogFileCtx *file_ctx, const char *string, size_t s
                     break;
             }
             freeReplyObject(reply);
+        } else {
+            SCConfLogReopenRedis(file_ctx);
+        }
     }
     return 0;
 }