Update rocketpy/mathutils/function.py

Co-authored-by: Copilot <[email protected]>

Author: Gui-FernandesBR

rocketpy/mathutils/function.py

@@ -650,8 +650,8 @@ def __determine_1d_domain_bounds(self, lower, upper):
             domain[1] = cropped[1]
 
         # Input bounds have preference
-        domain[0] = lower or domain[0]
-        domain[1] = upper or domain[1]
+        domain[0] = lower if lower is not None else domain[0]
+        domain[1] = upper if upper is not None else domain[1]
 
         return domain