修复可能死循环问题

Change-Id: Ie87f105fbe6c472919977c562ba91006e13e1af1
diff --git a/mbtk/mbtk_logd/alog_read.c b/mbtk/mbtk_logd/alog_read.c
index 6ca249b..161c5ab 100755
--- a/mbtk/mbtk_logd/alog_read.c
+++ b/mbtk/mbtk_logd/alog_read.c
@@ -195,7 +195,8 @@
                 }
                 default:
                     printf("process error \n");
-                    break;
+                    return -1;
+                    //break;
             }
             n++;
         }