tpm: Set the flags of the CMD_INIT command to 0

The flags of the CMD_INIT control channel command were not
initialized properly. Fix this and set to 0.
Signed-off-by: NStefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>

hw/tpm/tpm_emulator.c

@@ -320,7 +320,9 @@ static int tpm_emulator_set_buffer_size(TPMBackend *tb,
 static int tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize)
 {
     TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
-    ptm_init init;
+    ptm_init init = {
+        .u.req.init_flags = 0,
+    };
     ptm_res res;
 
     if (buffersize != 0 &&