Welcome message

src/freedombone-config

     if [ $MICROBLOG_CODE ]; then
         echo "MICROBLOG_CODE=$MICROBLOG_CODE" >> $CONFIGURATION_FILE
     fi
-    if [ $MICROBLOG_WELCOME_MESSAGE ]; then
+    if [ ${#MICROBLOG_WELCOME_MESSAGE} -gt 1 ]; then
         echo "MICROBLOG_WELCOME_MESSAGE=$MICROBLOG_WELCOME_MESSAGE" >> $CONFIGURATION_FILE
     fi
     if [ $MICROBLOG_BACKGROUND_IMAGE_URL ]; then