Wayland: Fix missing fullscreen code path

glfwRestoreWindow assumed it was only called in windowed mode.

README.md

@@ -338,6 +338,7 @@ information on what to include when reporting a bug.
  - [Wayland] Bugfix: A window maximized or restored by the user would enter an
    inconsistent state
  - [Wayland] Bugfix: Window maximization events were not emitted
+ - [Wayland] Bugfix: `glfwRestoreWindow` assumed it was always in windowed mode
  - [POSIX] Removed use of deprecated function `gettimeofday`
  - [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
  - [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)

src/wl_window.c

@@ -1912,13 +1912,21 @@ void _glfwIconifyWindowWayland(_GLFWwindow* window)
 
 void _glfwRestoreWindowWayland(_GLFWwindow* window)
 {
-    if (window->wl.xdg.toplevel)
+    if (window->monitor)
     {
-        if (window->wl.maximized)
-            xdg_toplevel_unset_maximized(window->wl.xdg.toplevel);
         // There is no way to unset minimized, or even to know if we are
         // minimized, so there is nothing to do in this case.
     }
+    else
+    {
+        // We assume we are not minimized and acto only on maximization
+
+        if (window->wl.xdg.toplevel)
+        {
+            if (window->wl.maximized)
+                xdg_toplevel_unset_maximized(window->wl.xdg.toplevel);
+        }
+    }
 }
 
 void _glfwMaximizeWindowWayland(_GLFWwindow* window)