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-rw-r--r--altoslib/AltosState.java8
1 files changed, 6 insertions, 2 deletions
diff --git a/altoslib/AltosState.java b/altoslib/AltosState.java
index 726c3041..e874a498 100644
--- a/altoslib/AltosState.java
+++ b/altoslib/AltosState.java
@@ -150,8 +150,12 @@ public class AltosState implements Cloneable {
void set_integral(AltosValue in) {
double change = in.integrate();
- if (change != AltosRecord.MISSING)
- set(prev_value + change, in.time());
+ if (change != AltosRecord.MISSING) {
+ double prev = prev_value;
+ if (prev == AltosRecord.MISSING)
+ prev = 0;
+ set(prev + change, in.time());
+ }
}
void copy(AltosValue old) {