Replace font_driver_free(NULL) calls with font_driver_free_osd()

inside video drivers

gfx/drivers/d3d.cpp

@@ -487,7 +487,8 @@ static void d3d_deinitialize(d3d_video_t *d3d)
    if (!d3d)
       return;
 
-   font_driver_free(NULL);
+   font_driver_free_osd();
+
    d3d_deinit_chain(d3d);
 }
 

gfx/drivers/vita2d_gfx.c

@@ -318,9 +318,7 @@ static void vita2d_gfx_free(void *data)
       vita->texture = NULL;
    }
 
-   font_driver_free(NULL);
-
-   RARCH_LOG("vita2d_gfx_free() done\n");
+   font_driver_free_osd();
 }
 
 static bool vita2d_gfx_set_shader(void *data,

gfx/drivers/vulkan.c

@@ -846,7 +846,8 @@ static void vulkan_free(void *data)
 
       /* No need to init this since textures are create on-demand. */
       vulkan_deinit_menu(vk);
-      font_driver_free(NULL);
+
+      font_driver_free_osd();
 
       vulkan_deinit_static_resources(vk);
       vulkan_overlay_free(vk);