syscalls needed for doom (tell/eof/draw_fb) + minor fixes, compiler shut up etc

include/fs/initfs.h

@@ -15,4 +15,10 @@ int tar_exists(const char* filename);
 int tar_read(char* filename, char* out, int count, int offset);
 void tar_list();
 
+enum Seek {
+    SEEK_SET,
+    SEEK_CUR,
+    SEEK_END
+};
+
 #endif

include/kernel.h

@@ -9,6 +9,7 @@
 
 #include "limine.h"
 
+// Not in POSIX order.
 enum ErrorCodes {
 	ENOMEM, // No memory
 	EIO,    // Input/output error