check-health: properly handle voltage value below one

Before this produced division by zero...

1 files changed, 3 insertions, 0 deletions

diff --git a/check-health b/check-health
index 7d52204..d1b45d5 100644
--- a/check-health
+++ b/check-health
@@ -19,6 +19,9 @@
 
 :local FormatVoltage do={
   :local Voltage [ :tonum $1 ];
+  :if ($Voltage < 10) do={
+    :return ("0." . $Voltage . "V");
+  }
   :return (($Voltage / 10) . "." . ($Voltage % ($Voltage / 10 * 10)) . "V");
 }