lmdk_bgt.discount: Dealing with zero

code/lib/lmdk_bgt.py

@@ -442,8 +442,11 @@ def discount(seq, lmdks, epsilon):
   lmdk_cur = 0
   # Track skipped releases
   skipped = 0
+  # Initialize the sampling rate
+  samp_rt = .5
   for i, p in enumerate(seq):
-    # The sampling rate
+    # Adjust the sampling rate
+    if lmdks:
       samp_rt = datetime.fromtimestamp(int(lmdks[lmdk_cur][3]))/datetime.fromtimestamp(int(lmdks[len(lmdks) - 1][3]))
     # Check if current point is a landmark
     if lmdk_lib.is_landmark(p, lmdks):