Zero the movingSum and buffer for laggedMovingAverage to prevent persistent error from being introduced on re-initialization

src/main/common/filter.c

@@ -208,6 +208,8 @@ void laggedMovingAverageInit(laggedMovingAverage_t *filter, uint16_t windowSize,
     filter->movingWindowIndex = 0;
     filter->windowSize = windowSize;
     filter->buf = buf;
+    filter->movingSum = 0;
+    memset(filter->buf, 0, windowSize * sizeof(float));
     filter->primed = false;
 }