VBOX: VboxManage returns an exit code of 0 when a RPC_S_SERVER_UNAVAILABLE error occurs. Special case the error.

samples/vboxwrapper/vbox.cpp

@@ -2882,6 +2882,11 @@ CLEANUP:
             sscanf(errcode.c_str(), "%x", &retval);
         }
 
+        // If something couldn't be found, just return ERR_FOPEN
+        if (!retval) retval = ERR_FOPEN;
+
+    } else {
+
         // Is this a RPC_S_SERVER_UNAVAILABLE returned by vboxsvc?
         if (!retval) {
             if (output.find("RPC_S_SERVER_UNAVAILABLE") != string::npos) {
@@ -2889,9 +2894,6 @@ CLEANUP:
             }
         }
 
-        // If something couldn't be found, just return ERR_FOPEN
-        if (!retval) retval = ERR_FOPEN;
-
     }
 
 #else