Fix incorrectly renamed strings

(cherry picked from commit 52c9c5f8ce)

src/viewarea.cpp

@@ -550,7 +550,7 @@ KDE_NO_EXPORT void CairoPaintVisitor::visit (SMIL::Transition *trans) {
             case SMIL::Transition::SubHorizontal:
                 phi = 0;
                 break;
-            default: //Qt::Vertical
+            default: // Vertical
                 phi = -M_PI / 2;
                 break;
         }