Sub: Don't set notify leak status if leak failsafe is disabled

ArduSub/failsafe.cpp

@@ -256,8 +256,6 @@ void Sub::failsafe_leak_check()
 {
     bool status = leak_detector.get_status();
 
-    AP_Notify::flags.leak_detected = status;
-
     // Do nothing if we are dry, or if leak failsafe action is disabled
     if (status == false || g.failsafe_leak == FS_LEAK_DISABLED) {
         if (failsafe.leak) {
@@ -267,6 +265,8 @@ void Sub::failsafe_leak_check()
         return;
     }
 
+    AP_Notify::flags.leak_detected = status;
+
     uint32_t tnow = AP_HAL::millis();
 
     // We have a leak