f2fs: unify string length declarations and usage

This patch is intended to unify string length declarations and usage.
There are number of calls to strlen which return size_t object.
The size of this object depends on compiler if it will be bigger,
equal or even smaller than an unsigned int

Signed-off-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 7d52e8d..940136a 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -208,7 +208,7 @@
 	struct page *page;
 	void *base_addr;
 	int error = 0, found = 0;
-	int value_len, name_len;
+	size_t value_len, name_len;
 
 	if (name == NULL)
 		return -EINVAL;
@@ -304,7 +304,8 @@
 	struct f2fs_xattr_entry *here, *last;
 	struct page *page;
 	void *base_addr;
-	int error, found, free, name_len, newsize;
+	int error, found, free, newsize;
+	size_t name_len;
 	char *pval;
 
 	if (name == NULL)