Fix a divide-by-zero crash in the 3ds Max plugins on really fast PCs

code/nel/tools/3d/object_viewer/object_viewer.cpp

@@ -1271,7 +1271,8 @@ void CObjectViewer::go ()
 			// Calc FPS
 			static sint64 lastTime=NLMISC::CTime::getPerformanceTime ();
 			sint64 newTime=NLMISC::CTime::getPerformanceTime ();
-			float fps = (float)(1.0 / NLMISC::CTime::ticksToSecond (newTime-lastTime));
+			sint64 timeDiff = newTime - lastTime;
+			float fps = timeDiff > 0 ? (float)(1.0 / NLMISC::CTime::ticksToSecond (newTime-lastTime)) : 1000.0f;
 			lastTime=newTime;
 			char msgBar[1024];
 			uint nbPlayingSources, nbSources;