Pass Exception correctly to logger

Related to issue 1879

Change-Id: Ia702f31e928d11ff466337e8cbfb4556bb4eccc4
Reviewed-on: http://gerrit.dmdirc.com/602
Automatic-Compile: Chris Smith <chris@dmdirc.com>
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/dcc/DCCSendWindow.java

                 Desktop.getDesktop().open(file);
             } catch (IllegalArgumentException ex) {
                     Logger.userError(ErrorLevel.LOW, "Unable to open file: " +
-                            file + ex);
+                            file, ex);
                     openButton.setEnabled(false);
             } catch (IOException ex) {
                 try {
                     Desktop.getDesktop().open(file.getParentFile());
                 } catch (IllegalArgumentException ex1) {
                     Logger.userError(ErrorLevel.LOW, "Unable to open folder: " +
-                            file.getParentFile() + ex1);
+                            file.getParentFile(), ex1);
                     openButton.setEnabled(false);
                 } catch (IOException ex1) {
                     Logger.userError(ErrorLevel.LOW, "No associated handler " +
-                            "to open file or directory." + ex1);
+                            "to open file or directory.", ex1);
                     openButton.setEnabled(false);
                 }
             }