Extra objects: Fix TypeError when torus knot added

TypeError is thrown when `torus knot object +` added with `7*6` preset.
`torus_res` is an IntProperty, and after python 3.10, implicit conversion
from float to int is not happening. Cast division value explicity to int to
fix the problem.

Pull Request: https://projects.blender.org/blender/blender-addons/pulls/104810

add_curve_extra_objects/add_curve_torus_knots.py

@@ -698,7 +698,7 @@ class torus_knot_plus(Operator, AddObjectHelper):
                 print("Approximate average TK length = %.2f" % avgTKLen)
 
             # x N factor = control points per unit length
-            self.torus_res = max(3, avgTKLen / links * 8)
+            self.torus_res = max(3, int(avgTKLen / links) * 8)
 
         # update align matrix
         self.align_matrix = align_matrix(self, context)