ensure that t0 <= t1 to prevent time-point crossover (leading to UI hangs)

profiler/src/profiler/TracyView_Timeline.cpp

@@ -159,6 +159,7 @@ void View::HandleTimelineMouse( int64_t timespan, const ImVec2& wpos, float w )
             t0 -= std::max( int64_t( 1 ), int64_t( p1 * mod ) );
             t1 += std::max( int64_t( 1 ), int64_t( p2 * mod ) );
         }
+        t1 = std::max(t0, t1);
         ZoomToRange( t0, t1, !m_worker.IsConnected() || m_viewMode == ViewMode::Paused );
     }
 }