samples: use findFile() in "python"

samples/python/tutorial_code/ImgTrans/MakeBorder/copy_make_border.py

@@ -14,15 +14,15 @@ def main(argv):
     window_name = "copyMakeBorder Demo"
     ## [variables]
     ## [load]
-    imageName = argv[0] if len(argv) > 0 else "../data/lena.jpg"
+    imageName = argv[0] if len(argv) > 0 else 'lena.jpg'
 
     # Loads an image
-    src = cv.imread(imageName, cv.IMREAD_COLOR)
+    src = cv.imread(cv.samples.findFile(imageName), cv.IMREAD_COLOR)
 
     # Check if image is loaded fine
     if src is None:
         print ('Error opening image!')
-        print ('Usage: copy_make_border.py [image_name -- default ../data/lena.jpg] \n')
+        print ('Usage: copy_make_border.py [image_name -- default lena.jpg] \n')
         return -1
     ## [load]
     # Brief how-to for this program