Prevent average from being less than zero

I may happen due to floating point precision errors while adding and
subtracting the same values (very close to zero).

Change-Id: Id1201cb0bafd7386595c463d54b55c3fae3922ee

diff --git a/src/data_source.c b/src/data_source.c
index e34ece6..180bc5a 100644 (file)
--- a/src/data_source.c
+++ b/src/data_source.c
@@ -81,6 +81,9 @@ int data_source_add_sample(struct data_source *ds, enum sample_type type,
         }
     }
 
+    if (sc->average < 0)
+        sc->average = 0;
+
     return 0;
 }