Fix uninitialized timed caches

This could prevent resizeable plugins from being resizeable in Ardour if
the initialized timestamp just happened to be greater than the current
time, since the returned result would then likely be some invalid value.

CHANGELOG.md

@@ -15,6 +15,9 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 ### Fixed
 
+- Fixed the `IPlugView::canResize()` cache added in yabridge 3.2.0 sometimes not
+  being initialized correctly, preventing host-driven resizes in certain
+  situations. This was mostly noticeable in **Ardour**.
 - Fixed mouse clicks in VST2 editors in **Tracktion Waveform** being offset
   vertically because of the way Waveform embeds VST2 editors.
 - Fixed _Shattered Glass Audio Code Red (Free)_ crashing when opening the plugin

src/common/utils.h

@@ -278,5 +278,5 @@ class TimedValueCache {
 
    private:
     T value;
-    time_t valid_until;
+    time_t valid_until = 0;
 };