Fix MaximizeWindow() for PLATFORM_WEB (#4404)

src/platforms/rcore_web.c

@@ -319,7 +319,7 @@ void ToggleBorderlessWindowed(void)
 // Set window state: maximized, if resizable
 void MaximizeWindow(void)
 {
-    if (glfwGetWindowAttrib(platform.handle, GLFW_RESIZABLE) == GLFW_TRUE)
+    if (glfwGetWindowAttrib(platform.handle, GLFW_RESIZABLE) == GLFW_TRUE && !(CORE.Window.flags & FLAG_WINDOW_MAXIMIZED))
     {
         platform.unmaximizedWidth = CORE.Window.screen.width;
         platform.unmaximizedHeight = CORE.Window.screen.height;
@@ -342,7 +342,7 @@ void MinimizeWindow(void)
 // Set window state: not minimized/maximized
 void RestoreWindow(void)
 {
-    if (glfwGetWindowAttrib(platform.handle, GLFW_RESIZABLE) == GLFW_TRUE)
+    if (glfwGetWindowAttrib(platform.handle, GLFW_RESIZABLE) == GLFW_TRUE && (CORE.Window.flags & FLAG_WINDOW_MAXIMIZED))
     {
         if (platform.unmaximizedWidth && platform.unmaximizedHeight) glfwSetWindowSize(platform.handle, platform.unmaximizedWidth, platform.unmaximizedHeight);