Forcing lightweight build to be installed as a normal user

Change-Id: I23529d8b3a294ca5fbe23bec4b51fa7c3fbfe258
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index b22b9e2..ffd4a27 100755
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -650,6 +650,7 @@
 }
 
 function install_lightweight() {
+    [ "$USER" == "root" ] && FATAL "You are running the installer as root. The installer is prepared to be executed as a normal user with sudo privileges."
     echo "Installing lightweight build of OSM"
     LWTEMPDIR="$(mktemp -d -q --tmpdir "installosmlight.XXXXXX")"
     trap 'rm -rf "${LWTEMPDIR}"' EXIT