fix: Use torch.round().long() for timestep comparison line 303 to han…

…dle floating-point precision

src/diffusers/schedulers/scheduling_flow_match_euler_discrete.py

@@ -299,7 +299,8 @@ def set_timesteps(
     def index_for_timestep(self, timestep, schedule_timesteps=None):
         if schedule_timesteps is None:
             schedule_timesteps = self.timesteps
-
+
+        schedule_timesteps = torch.round(schedule_timesteps).long()
         indices = (schedule_timesteps == timestep).nonzero()
 
         # The sigma index that is taken for the **very** first `step`