Apply suggestion to userprog/process.c

userprog/process.c

@@ -227,7 +227,7 @@ load (const char *file_name, void (**eip) (void), void **initial_stack_pointer)
 {
   struct thread *t = thread_current ();
   struct Elf32_Ehdr ehdr;
-  struct file * = NULL;
+  struct file *file = NULL;
   off_t file_ofs;
   bool success = false;
   int i;