Corrected cross reference

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@7563 383ad7c9-94d9-4d36-a494-682f7c89f535

Doxygen/Developer/tutorial2.docu

@@ -45,7 +45,7 @@
  * \skipline void log(
  * \skipline void log(
  *
- * The last Interface that's left over is the \c ToolboxInterface from which we are only implenting one signal:
+ * The last Interface that's left over is the \c ToolboxInterface from which we are only implementing one signal:
  *
  * \dontinclude example/SmootherPlugin.hh
  * \skipline void addToolbox( QString _name, QWidget* _widget );