fix warnings

Fix a couple warnings so we can use meson warning level 3.  Instances of
the following warnings are found and resolved:

  Wreorder
  Wsign-compare

Change-Id: Ia223b42aa6bf743cfa0e7042cc3d5a18977459be
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/src/ADCSensor.cpp b/src/ADCSensor.cpp
index 3daadcb..22194e8 100644
--- a/src/ADCSensor.cpp
+++ b/src/ADCSensor.cpp
@@ -54,10 +54,10 @@
     Sensor(boost::replace_all_copy(sensorName, " ", "_"),
            std::move(_thresholds), sensorConfiguration,
            "xyz.openbmc_project.Configuration.ADC", maxReading, minReading),
-    objServer(objectServer), scaleFactor(scaleFactor), path(path),
-    readState(std::move(readState)), inputDev(io, open(path.c_str(), O_RDONLY)),
-    waitTimer(io), errCount(0), thresholdTimer(io, this),
-    bridgeGpio(std::move(bridgeGpio))
+    objServer(objectServer), inputDev(io, open(path.c_str(), O_RDONLY)),
+    waitTimer(io), path(path), errCount(0), scaleFactor(scaleFactor),
+    bridgeGpio(std::move(bridgeGpio)), readState(std::move(readState)),
+    thresholdTimer(io, this)
 {
     sensorInterface = objectServer.add_interface(
         "/xyz/openbmc_project/sensors/voltage/" + name,