hla: Do not call time advance with non positive increment.

diff --git a/simgear/hla/HLAFederate.cxx b/simgear/hla/HLAFederate.cxx
index 75465af470ddf0d0fc96da1231c67c0e47db60f6..d39d8aaa4ad5f2c9c938ab61aec822f6e2de883c 100644 (file)
--- a/simgear/hla/HLAFederate.cxx
+++ b/simgear/hla/HLAFederate.cxx
@@ -1069,7 +1069,10 @@ HLAFederate::init()
 bool
 HLAFederate::update()
 {
-    return timeAdvanceBy(_timeIncrement);
+    if (_timeIncrement <= SGTimeStamp::fromSec(0))
+        return processMessages();
+    else
+        return timeAdvanceBy(_timeIncrement);
 }
 
 bool