win-capture: Log if shared texture capture is unavailable

plugins/win-capture/game-capture.c

@@ -735,13 +735,10 @@ static inline bool init_hook_info(struct game_capture *gc)
 	reset_frame_interval(gc);
 
 	obs_enter_graphics();
-	if (!gs_shared_texture_available())
-		gc->global_hook_info->force_shmem = true;
-	obs_leave_graphics();
-
-	obs_enter_graphics();
-	if (!gs_shared_texture_available())
+	if (!gs_shared_texture_available()) {
+		warn("init_hook_info: shared texture capture unavailable");
 		gc->global_hook_info->force_shmem = true;
+	}
 	obs_leave_graphics();
 
 	return true;