[CIFS] remove two sparse warnings

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 780c0e3..1e7e4c0 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1755,7 +1755,7 @@
 	struct page *page;
 	struct cifs_sb_info *cifs_sb;
 	struct cifsTconInfo *pTcon;
-	int bytes_read = 0;
+	unsigned int bytes_read = 0;
 	unsigned int read_size, i;
 	char *smb_read_data = NULL;
 	struct smb_com_read_rsp *pSMBr;
@@ -1849,7 +1849,7 @@
 
 			i +=  bytes_read >> PAGE_CACHE_SHIFT;
 			cifs_stats_bytes_read(pTcon, bytes_read);
-			if ((int)(bytes_read & PAGE_CACHE_MASK) != bytes_read) {
+			if ((bytes_read & PAGE_CACHE_MASK) != bytes_read) {
 				i++; /* account for partial page */
 
 				/* server copy of file can have smaller size