Fix memory leaks

Fix a couple leaks caught by valgrind.

src/gl-renderer.c

@@ -1707,6 +1707,8 @@ gl_renderer_destroy(struct weston_compositor *ec)
 
 	eglTerminate(gr->egl_display);
 	eglReleaseThread();
+
+	free(gr);
 }
 
 static int

src/shell.c

@@ -2002,6 +2002,7 @@ destroy_shell_surface(struct shell_surface *shsurf)
 	wl_list_remove(&shsurf->surface_destroy_listener.link);
 	shsurf->surface->configure = NULL;
 	ping_timer_destroy(shsurf);
+	free(shsurf->title);
 
 	wl_list_remove(&shsurf->link);
 	free(shsurf);