fix a potential error

lib/scripts/plot_data.py

@@ -402,7 +402,7 @@ class SequenceScoreFace(StaticItemFace):
 def get_corr_color(x):
     score = [1,0.99,0.9,0.8,0.7,0.5,0]
     color = ["red", "red",  "orange", "#EFDB00", "#6BAC00", "#7174D0",  "#A3A3A3"]
-
+    res = "#A3A3A3"
     for i in range(len(score)):
         if x >= score[i]:
             res = color[i]