Exit instead of return if no package name is given

src/freedombone-utils-snap

@@ -30,7 +30,8 @@ function install_snap {
     snap_package="$1"
 
     if [ ! "$snap_package" ]; then
-        return
+        echo $'No snap package was specified'
+        exit 257625472
     fi
     no_of_snaps=$(df | grep -c "/snap/core/")
     if [ "$no_of_snaps" -eq 0 ]; then
@@ -46,7 +47,8 @@ function remove_snap {
     snap_package="$1"
 
     if [ ! "$snap_package" ]; then
-        return
+        echo $'No snap package was specified'
+        exit 45332485421
     fi
 
     snap remove "$snap_package"