utils: raspberrypi: ctt: Fix pycodestyle E302

E302 expected 2 blank lines, found 0

Note that issues are still flagged, due to the use of docstrings as
multi-lines comments. This will be addressed separately.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

utils/raspberrypi/ctt/ctt_ransac.py

@@ -8,6 +8,7 @@ import numpy as np
 
 scale = 2
 
+
 """
 constructs normalised macbeth chart corners for ransac algorithm
 """
@@ -57,6 +58,7 @@ def get_square_verts(c_err=0.05, scale=scale):
     # print(square_verts)
     return np.array(square_verts, np.float32), mac_norm
 
+
 def get_square_centres(c_err=0.05, scale=scale):
     """
     define macbeth square centres