Revert the zoom direction on Ctrl-mouse wheel in wxStyledTextCtrl.

The direction of the zoom in wxSTC didn't correspond to the usual conventions
which is to zoom in on Ctrl-Wheel-Up and zoom out on Ctrl-Wheel-Down, while
wxSTC did exactly the converse. Change it to behave as everybody else.

Closes #14031.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70839 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/stc/ScintillaWX.cpp

@@ -827,7 +827,7 @@ void ScintillaWX::DoMouseWheel(int rotation, int delta,
     int lines;
 
     if (ctrlDown) {  // Zoom the fonts if Ctrl key down
-        if (rotation < 0) {
+        if (rotation > 0) {
             KeyCommand(SCI_ZOOMIN);
         }
         else {