Fix misleading "curl init failed" error log in Device_WiFi_SSID.cpp

[Copilot]

The else branch handling an empty getJsonRPCData() response for GetAvailableInterfaces was logging "curl init failed" — a message that implies a cURL initialization error rather than an empty/failed JSON-RPC response.

Change

Updated the error message to "getJsonRPCData() failed", consistent with the equivalent empty-response else branch already used for the GetWifiState call:

// Before
RDK_LOG(RDK_LOG_ERROR, LOG_TR69HOSTIF, "%s: curl init failed\n", __FUNCTION__);

// After
RDK_LOG(RDK_LOG_ERROR, LOG_TR69HOSTIF, "%s: getJsonRPCData() failed\n", __FUNCTION__);

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