Minor changes

lib/src/sensorconfig.cpp

@@ -1966,7 +1966,7 @@ SCError SensorConfigImpl::findSensorCachePath(std::string &path) {
 
         // Cache dir exists but it is not writeable
         if (access(path.c_str(), W_OK) != 0) {
-            throw std::runtime_error("Cache directory is not writeable!");
+            throw std::domain_error("Cache directory is not writeable!");
         }
     } catch(const std::domain_error& e) {
         path = "/tmp/";