[Feature]][API-1041] Add SMS length limit

Change-Id: Iba1708443081b070359d8a0ef81295f26b65f1c2
diff --git a/src/lynq/lib/liblynq-sms/lynq_sms.cpp b/src/lynq/lib/liblynq-sms/lynq_sms.cpp
index f457d7c..73cd37f 100755
--- a/src/lynq/lib/liblynq-sms/lynq_sms.cpp
+++ b/src/lynq/lib/liblynq-sms/lynq_sms.cpp
@@ -132,7 +132,7 @@
 int lynq_send_sms(char telephony_num[TELEPHONE_NUM_LEN], int charset, char *msg, int msglen)

 {

     LYINFLOG("charset is %d, msglen %d\n", charset, msglen);

-    if(msglen > MSG_MAX_LEN || msglen < 0)

+    if(msglen > MSG_MAX_LEN || msglen <= 0)

     {

         LYERRLOG("msglen out of the range");

         return LYNQ_E_SMS_MSGLEN_OUT_OF_RANGE;