proc: fix type of struct pde_opener::closing field

struct pde_opener::closing is boolean.

Link: http://lkml.kernel.org/r/20161029155439.GB1246@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 5378441..153db5f 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -203,7 +203,7 @@ struct proc_dir_entry *proc_create_mount_point(const char *name);
 struct pde_opener {
 	struct file *file;
 	struct list_head lh;
-	int closing;
+	bool closing;
 	struct completion *c;
 };
 extern const struct inode_operations proc_link_inode_operations;