Fix for possible leak of ephemeral key in TLS server example.

Author: dgarske

examples/tls/tls_server.c

@@ -513,6 +513,9 @@ int TPM2_TLS_ServerArgs(void* userCtx, int argc, char *argv[])
 #ifdef HAVE_ECC
     wc_ecc_free(&wolfEccKey);
     wolfTPM2_UnloadHandle(&dev, &eccKey.handle);
+    #ifndef WOLFTPM2_USE_SW_ECDHE
+        wolfTPM2_UnloadHandle(&dev, &ecdhKey.handle);
+    #endif
 #endif
     wolfTPM2_UnloadHandle(&dev, &tpmSession.handle);