add xdg env check

.bashrc.d/01-env.bashrc

@@ -23,6 +23,7 @@ if [[ -d "$HOME/.local/bin" ]] ; then
 fi
 
 # Check if XDG environment variables are set or set them to default
+if command -v xdg-user-dir 1> /dev/null; then
   if [[ -z "$XDG_DATA_HOME" ]]; then
     export XDG_DATA_HOME=$HOME/.local/share
   fi
@@ -44,6 +45,7 @@ else
     XDG_DOWNLOAD_DIR="$(xdg-user-dir DOWNLOAD)"
     export XDG_DOWNLOAD_DIR
   fi
+fi
 
 # ==============================
 # Shell