Fixed minor errors in syscall_filesize

syscall_filesize.c
line 14: Added passed in variable to file_search()
line 16: Fixed return for failure state

userprog/syscall_filesize.c

@@ -11,9 +11,9 @@ int syscall_filesize(struct intr_frame *f) {
 	struct file_map *f_map; // Described in system_calls.h
 	// pop off first int argument from interrupt frame
 	f_map->file_descriptor = *((int*)f->esp + 1);
-	file_search();
+	file_search(*f_map);
 	if (f_map->file == NULL) { // Checking if file is empty or non-existent
-		return -1; // Returning failure state
+		f->eax -1; // Returning failure state
 	}
 	// Using the file_length function in file.h to get the length and store it
 	int size = file_length(f_map->file);