Fix invalid surface size under Wayland when GHOST set the window size

When the window manager set the window size, there were no checks
the size is a multiple of the buffer scale (a requirement for Wayland).

This meant setting the window size could exit Blender without warning
if an invalid window size was set.

intern/ghost/intern/GHOST_WindowWayland.cc

@@ -1683,8 +1683,11 @@ GHOST_TSuccess GHOST_WindowWayland::setClientSize(const uint32_t width, const ui
   std::lock_guard lock_frame_guard{window_->frame_pending_mutex};
 #endif
 
-  window_->frame_pending.size[0] = width;
-  window_->frame_pending.size[1] = height;
+  GWL_WindowFrame &frame_pending = window_->frame_pending;
+
+  frame_pending.size[0] = width;
+  frame_pending.size[1] = height;
+  gwl_round_int2_by(frame_pending.size, frame_pending.buffer_scale);
 
   gwl_window_frame_pending_size_set(window_, nullptr, nullptr, nullptr);