WifiHal: Fix junk data append to error info

Bug: 37514146
Bug: 37704662
Test: builds
CRs-Fixed: 2079318
Change-Id: I896004dfd657209cccbc46d613cc6d8f40d658f8
diff --git a/qcwcn/wifi_hal/nan_rsp.cpp b/qcwcn/wifi_hal/nan_rsp.cpp
index 2fe36c1..360134e 100644
--- a/qcwcn/wifi_hal/nan_rsp.cpp
+++ b/qcwcn/wifi_hal/nan_rsp.cpp
@@ -347,6 +347,7 @@
     NanPublishTerminatedInd* pRspInd;
     NanDisabledInd* pRspdInd;
     char tlvInfo[NAN_ERROR_STR_LEN];
+    tlvInfo[0] = '\0';
 
     if (isNanResponse()) {
         pRsp = (NanResponseMsg*)pResponse;