Instead of passing FatFS structs around, unmount; other changes

fusee/fusee-secondary/src/splash_screen.c

@@ -6,16 +6,16 @@
 #include "display/video_fb.h"
 
 void display_splash_screen_bmp(const char *custom_splash_path) {
-    unsigned char *splash_screen = g_default_splash_screen;
+    uint8_t *splash_screen = g_default_splash_screen;
     if (custom_splash_path != NULL && custom_splash_path[0] != '\x00') {
         if (!read_sd_file(splash_screen, sizeof(g_default_splash_screen), custom_splash_path)) {
             printk("Error: Failed to read custom splash screen from %s!\n", custom_splash_path);
             generic_panic();
         }
     }
-    
+
     /* TODO: Display the splash screen. It should be a pointer to a BMP, at this point. */
-    
+
     /* Display the splash screen for three seconds. */
     wait(3000000);
-}
+}