Fixes issue 3839: Textpane selection is still broken when selecting downwards (when cursor is between two lines)

Change-Id: Ib9656cc9bb37d9041ef6d33b6492854a066e1d2f
Reviewed-on: http://gerrit.dmdirc.com/953
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/ui_swing/textpane/TextPaneCanvas.java

                 }
             }
             final LineInfo info = getClickPosition(point, true);
-            if (info.getLine() == -1 && info.getPart() == -1 && contains(point)) {
-                info.setLine(0);
-                info.setPart(0);
-                info.setIndex(0);
-            }
             if (info.getLine() != -1 && info.getPart() != -1) {
                 if (type == MouseEventType.CLICK) {
                     selection.setStartLine(info.getLine());