btrfs: fix bool type in btrfs_page_exists_in_range

We use only a simple bool indicator, int is not a problem here.

Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 97b2bb9..683ee05 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7486,7 +7486,7 @@
 bool btrfs_page_exists_in_range(struct inode *inode, loff_t start, loff_t end)
 {
 	struct radix_tree_root *root = &inode->i_mapping->page_tree;
-	int found = false;
+	bool found = false;
 	void **pagep = NULL;
 	struct page *page = NULL;
 	unsigned long start_idx;