add:修复win32编译报错

components/lvgl/binding/luat_lib_lvgl_font.c

@@ -13,7 +13,9 @@
 #include "luat_lvgl_fonts.h"
 #include "luat_spi.h"
 
-extern luat_spi_device_t* gt_spi_dev;
+#ifdef LUAT_USE_GTFONT
+    extern luat_spi_device_t* gt_spi_dev;
+#endif
 
 /*
 获取内置字体
@@ -81,23 +83,23 @@ local font = lvgl.font_load("/font_simsun_32.bin")
 int luat_lv_font_load(lua_State *L) {
     lv_font_t *font = NULL;
     if (lua_isuserdata(L, 1)) {
-        luat_spi_device_t *spi = lua_touserdata(L, 1);
-        uint8_t size = luaL_optinteger(L, 2, 16);
-        uint8_t bpp = luaL_optinteger(L, 3, 4);
-        uint16_t thickness = luaL_optinteger(L, 4, size * bpp);
-        uint8_t cache_size = luaL_optinteger(L, 5, 0);
-        uint8_t sty_zh = luaL_optinteger(L, 6, 1);
-        uint8_t sty_en = luaL_optinteger(L, 7, 3);
-
-        if (!(bpp >= 1 && bpp <= 4 && bpp != 3)) {
-            return 0;
-        }
-
-        if (gt_spi_dev == NULL) {
-            gt_spi_dev = lua_touserdata(L, 1);
-        }
+        #ifdef LUAT_USE_GTFONT
+            luat_spi_device_t *spi = lua_touserdata(L, 1);
+            uint8_t size = luaL_optinteger(L, 2, 16);
+            uint8_t bpp = luaL_optinteger(L, 3, 4);
+            uint16_t thickness = luaL_optinteger(L, 4, size * bpp);
+            uint8_t cache_size = luaL_optinteger(L, 5, 0);
+            uint8_t sty_zh = luaL_optinteger(L, 6, 1);
+            uint8_t sty_en = luaL_optinteger(L, 7, 3);
 
-        font = lv_font_new_gt(sty_zh, sty_en, size, bpp, thickness, cache_size);
+            if (!(bpp >= 1 && bpp <= 4 && bpp != 3)) {
+                return 0;
+            }
+            if (gt_spi_dev == NULL) {
+                gt_spi_dev = lua_touserdata(L, 1);
+            }
+            font = lv_font_new_gt(sty_zh, sty_en, size, bpp, thickness, cache_size);
+        #endif
     } else {
         const char* fontname = luaL_checkstring(L, 1);
         font = lv_font_load(fontname);