vz: Don't try to jump on a non-existent label in prlsdkRemoveBootDevices()

Commit v5.10.0-522-g9000b2f2 was too aggressive and removed the
'error' label from prlsdkRemoveBootDevices() even though it's
used. Luckily, it's used only from one place and we have an
alternative for it that doesn't require the label.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/vz/vz_sdk.c

@@ -2725,7 +2725,7 @@ prlsdkRemoveBootDevices(PRL_HANDLE sdkdom)
     PRL_DEVICE_TYPE devType;
 
     pret = PrlVmCfg_GetBootDevCount(sdkdom, &devCount);
-    prlsdkCheckRetGoto(pret, error);
+    prlsdkCheckRetExit(pret, -1);
 
     for (i = 0; i < devCount; i++) {