BUG: change order of print and length set

rocketpy/rocket/aero_surface.py

@@ -426,12 +426,12 @@ def final_shape(x):
         # Evaluate final geometry parameters
         self.shape_vec = [nosecone_x, nosecone_y]
         if abs(nosecone_x[-1] - self.length) >= 0.001:  # 1 milimiter
+            self._length = nosecone_x[-1]
             print(
                 "Due to the chosen bluffness ratio, the nose cone length was reduced to m.".format(
                     self.length
                 )
             )
-            self._length = nosecone_x[-1]
         self.fineness_ratio = self.length / (2 * self.base_radius)
 
         return None