Fix Uninitialised value error in createSparklineSequence (LATENCY GRAPH) (#11892)

This was exposed by a new LATENCY GRAPH valgrind test.
There are no security implications, fix by initializing
these members.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/sparkline.c b/src/sparkline.c
index 67482c774..4c0f2b81f 100644
--- a/src/sparkline.c
+++ b/src/sparkline.c
@@ -57,7 +57,10 @@ static int label_margin_top = 1;
 struct sequence *createSparklineSequence(void) {
     struct sequence *seq = zmalloc(sizeof(*seq));
     seq->length = 0;
+    seq->labels = 0;
     seq->samples = NULL;
+    seq->min = 0.0f;
+    seq->max = 0.0f;
     return seq;
 }