esx_vi: return -1 upon failure, as intended

* src/esx/esx_vi.c (esxVI_Enumeration_Deserialize): Fix
reversed goto and result=-1 statements.

src/esx/esx_vi.c

@@ -856,9 +856,8 @@ esxVI_Enumeration_Deserialize(virConnectPtr conn,
     return result;
 
   failure:
-    goto cleanup;
-
     result = -1;
+    goto cleanup;
 }