Page zoom is broken

[jdm]

With the following patch applied, pressing cmd and + produces broken rendering:

diff --git a/ports/glutin/window.rs b/ports/glutin/window.rs
index e856547..70507d7 100644
--- a/ports/glutin/window.rs
+++ b/ports/glutin/window.rs
@@ -995,7 +995,7 @@ impl WindowMethods for Window {
     /// Helper function to handle keyboard events.
     fn handle_key(&self, ch: Option<char>, key: Key, mods: constellation_msg::KeyModifiers) {
         match (mods, ch, key) {
-            (_, Some('+'), _) => {
+            (_, Some('='), _) => {
                 if mods & !SHIFT == CMD_OR_CONTROL {
                     self.event_queue.borrow_mut().push(WindowEvent::Zoom(1.1));
                 } else if mods & !SHIFT == CMD_OR_CONTROL | ALT {

[jdm]

Base rendering:

After one zoom: