Add missing return for empty configuration

Should not continue on error.

Change-Id: Ic6ab18806d654e25f2f23ac2aaa8ff79c531b9d4
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/src/ExitAirTempSensor.cpp b/src/ExitAirTempSensor.cpp
index c7e6e8e..9e493f0 100644
--- a/src/ExitAirTempSensor.cpp
+++ b/src/ExitAirTempSensor.cpp
@@ -132,6 +132,7 @@
             if (ec)
             {
                 std::cerr << "Error getting properties from " << path << "\n";
+                return;
             }
 
             double max = loadVariant<double>(data, "MaxValue");