HS: Fix HS KP is missing at display update.

src/View/HydraulicStructures/Window.py

@@ -292,7 +292,7 @@ class HydraulicStructuresWindow(PamhyrWindow):
                                     float(profile_kp)
                                 )
 
-                if profiles is not None:
+                if len(profiles) != 0 and profiles is not None:
                     profile = profiles[0]
 
                     self.plot_kpc.set_profile(profile)