Fix for apm_planner issue #3, Serial port handling of '-' characters, since OSX can have a '-' in the port name

src/ui/QGCToolBar.cc

@@ -608,9 +608,11 @@ void QGCToolBar::connectLink(bool connect)
             if (link)
             {
                 QString portname = portComboBox->currentText().split(":")[2];
-                if (portname.indexOf('-') != -1)
+                if (portname.indexOf('-') >= 0)
                 {
-                    portname = portname.split("-")[0];
+                    //Take everything before the last -, this ensures if the com port has a - in it, it will be included,
+                    //since the last - is inserted by me.
+                    portname = portname.mid(0,portname.lastIndexOf("-")-1);
                 }
                 link->setPortName(portname.trimmed());
             }