fix the return type of leavefs

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2249 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/dfs/filesystems/elmfat/dfs_elm.c

@@ -105,7 +105,7 @@ int dfs_elm_mount(struct dfs_filesystem *fs, unsigned long rwflag, const void *d
 	if (result == FR_OK)
 	{
 		extern FRESULT chk_mounted(const TCHAR **path, FATFS **rfs, BYTE chk_wp);
-		extern void leavefs(FATFS*	fs, int res);
+		extern int leavefs(FATFS*	fs, int res);
 		char driver[16];
 		const char * path;
 		DIR dj;

components/dfs/filesystems/elmfat/ff.c

@@ -4020,7 +4020,7 @@ int elm_get_vol(FATFS *fat)
 }
 #endif
 
-void leavefs(FATFS*	fs, int res)
+int leavefs(FATFS*	fs, int res)
 {
 	LEAVE_FF(fs, res);
 }