qemuxml2argvtest: Don't leak TPM unix path

When testing a domain XML with TPM we overwrite UNIX socket path
to mimic what qemuTPMEmulatorPrepareHost() is doing (because
*PrepareHost() functions are not called from the test). But we
are not doing it fully - we need to set the chardev's type too so
that virDomainTPMDefFree() can free the path.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

tests/qemuxml2argvtest.c

@@ -551,9 +551,11 @@ testCompareXMLToArgv(const void *data)
     if (vm->def->tpm) {
         switch (vm->def->tpm->type) {
         case VIR_DOMAIN_TPM_TYPE_EMULATOR:
+            VIR_FREE(vm->def->tpm->data.emulator.source.data.file.path);
             if (VIR_STRDUP(vm->def->tpm->data.emulator.source.data.file.path,
                            "/dev/test") < 0)
                 goto cleanup;
+            vm->def->tpm->data.emulator.source.type = VIR_DOMAIN_CHR_TYPE_FILE;
             break;
         case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
         case VIR_DOMAIN_TPM_TYPE_LAST: