fix(vfs): add platform guards for VFS browser

- Add HAVE_VFS guard to menu_vfs_browser.h
- Add HAVE_VFS guard to menu_vfs_browser.c
- Move menu_vfs_browser.o to HAVE_VFS conditional in Makefile

Fixes build on platforms without VFS support (3DS, Wii, PS2, etc.)

Author: 龙虾机器人

Makefile.common

@@ -588,9 +588,11 @@ ifeq ($(HAVE_LIBRETRODB), 1)
 
    ifeq ($(HAVE_MENU), 1)
       OBJ += menu/menu_explore.o \
-             menu/menu_vfs_browser.o \
              tasks/task_menu_explore.o
    endif
+   ifeq ($(HAVE_VFS), 1)
+      OBJ += menu/menu_vfs_browser.o
+   endif
 endif
 
 ifeq ($(HAVE_BUILTINBEARSSL), 1)

menu/menu_vfs_browser.c

@@ -13,6 +13,8 @@
  *  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#if defined(HAVE_VFS) && !defined(__3DS__) && !defined(GEKKO) && !defined(PS2) && !defined(WIIU) && !defined(__DJGPP__) && !defined(WEBOS)
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -404,3 +406,5 @@ enum vfs_scheme menu_vfs_browser_get_scheme(void)
 {
    return g_vfs_browser.scheme;
 }
+
+#endif /* HAVE_VFS guard */

menu/menu_vfs_browser.h

@@ -13,6 +13,8 @@
  *  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#if defined(HAVE_VFS) && !defined(__3DS__) && !defined(GEKKO) && !defined(PS2) && !defined(WIIU) && !defined(__DJGPP__) && !defined(WEBOS)
+
 #ifndef __MENU_VFS_BROWSER_H
 #define __MENU_VFS_BROWSER_H
 
@@ -111,3 +113,5 @@ RETRO_END_DECLS
 
 #endif /* __MENU_VFS_BROWSER_H */
 
+#endif /* HAVE_VFS guard */
+