[JFFS2] fix sparse warnings in gc.c

fs/jffs2/gc.c:1147:29: warning: symbol 'jeb' shadows an earlier one
fs/jffs2/gc.c:1084:89: originally declared here
fs/jffs2/gc.c:1197:29: warning: symbol 'jeb' shadows an earlier one
fs/jffs2/gc.c:1084:89: originally declared here

Rename the unused 'jeb' argument to avoid this. We could potentially
remove the argument, but GCC should be doing that anyway.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

fs/jffs2/gc.c

@@ -1081,7 +1081,7 @@ static int jffs2_garbage_collect_hole(struct jffs2_sb_info *c, struct jffs2_eras
 	return 0;
 }
 
-static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_dnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *orig_jeb,
 				       struct jffs2_inode_info *f, struct jffs2_full_dnode *fn,
 				       uint32_t start, uint32_t end)
 {