Re-init VNC extension on server reset

fc23895 blocked out a bit too much code when trying to make
libvnc handle server resets. Even though configuration should
only be handled once, the underlying VNC extension needs to
be reinitilised as the X core has removed all extensions on
reset.

unix/xserver/hw/vnc/xf86vncModule.cc

@@ -112,9 +112,9 @@ static void vncExtensionInitWithParams(INITARGS)
           i.param->setParam(val);
       }
     }
-
-    vncExtensionInit();
   }
+
+  vncExtensionInit();
 }
 }