Prevent flush from creating cursor without con

MysqlRed.flush() tried to create a cursor in any case. If there was no
connection (because the subclasses haven't been instantiated an oursql
Error occured.
Instead, check before if there is a connection and otherwise raise an Error

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=75 FS#75]

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=75 FS#75]

reddiscparser.py

@@ -123,7 +123,7 @@ class DiscussionParserBot(
                         reddisc=red_page.page.title() ) )
                 else:
                     jogobot.output(
-                        "\03{red} Page [[{reddisc}]], ".format(
+                        "\03{red}" + "Page [[{reddisc}]], ".format(
                             reddisc=red_page.page.title() ) +
                         "containing no redfam, parsed!",
                         "WARNING" )