Fix email fix

src/freedombone-app-mediagoblin

     # does not have mail access
     read_config_param 'MEDIAGOBLIN_DOMAIN_NAME'
     MEDIAGOBLIN_BASE_DIR=/var/www/$MEDIAGOBLIN_DOMAIN_NAME/htdocs
-    mgfile=$MEDIAGOBLIN_BASE_DIR/mediagoblin/tools/mail.py
+    mgfile=$MEDIAGOBLIN_BASE_DIR/mediagoblin/mediagoblin/tools/mail.py
+    if [ ! -f $mgfile ]; then
+        echo $'Unable to fix email sending'
+        exit 792532
+    fi
     if ! grep 'import os' $mgfile; then
         sed -i '/import sys/a import os' $mgfile
     fi
-    replacestr='return mhost.sendmail(from_addr, to_addrs, message.as_string())'
-    newstr="return os.system(\"echo '\" + message_body + \"' | mail -s '\" + message['Subject'] + \"' \" + message['To'])"
-    sed -i "s|${replacestr}|${newstr}|g" $mgfile
+    sed -i "s|return mhost.sendmail(from_addr, to_addrs, message.as_string())|return os.system(\"echo '\" + message_body + \"' \| mail -s '\" + message['Subject'] + \"' \" + message['To'])|g" $mgfile
 }
 
 function install_interactive_mediagoblin {