wlan: Memory corruption fix

Memory corruption happen due to not properly set MSG element. Garbage
argument value will make overwrite memory area

Change-Id: I677b86def8d90207e4090e1d2f3714ce75bffd95
CR-Fixed: 415391
diff --git a/CORE/MAC/inc/sirApi.h b/CORE/MAC/inc/sirApi.h
index d1942a7..5ee5a6a 100644
--- a/CORE/MAC/inc/sirApi.h
+++ b/CORE/MAC/inc/sirApi.h
@@ -695,8 +695,12 @@
     // Please keep the structure 4 bytes aligned above the ieFields
 
     tANI_U8              fProbeRsp; //whether it is from a probe rsp
+    tANI_U8              reservedPadding1;
+    tANI_U8              reservedPadding2;
+    tANI_U8              reservedPadding3;
     tANI_U32             WscIeLen;
     tANI_U8              WscIeProbeRsp[WSCIE_PROBE_RSP_LEN];
+    tANI_U8              reservedPadding4;
 
     tANI_U32             ieFields[1];
 } tSirBssDescription, *tpSirBssDescription;