NTFS: Fix sparse warnings that have crept in over time.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h
index 609ad17..dbf5c2a 100644
--- a/fs/ntfs/layout.h
+++ b/fs/ntfs/layout.h
@@ -317,12 +317,13 @@
 typedef le64 leMFT_REF;
 
 #define MK_MREF(m, s)	((MFT_REF)(((MFT_REF)(s) << 48) |		\
-					((MFT_REF)(m) & MFT_REF_MASK_CPU)))
+					((MFT_REF)(m) & (u64)MFT_REF_MASK_CPU)))
 #define MK_LE_MREF(m, s) cpu_to_le64(MK_MREF(m, s))
 
-#define MREF(x)		((unsigned long)((x) & MFT_REF_MASK_CPU))
+#define MREF(x)		((unsigned long)((x) & (u64)MFT_REF_MASK_CPU))
 #define MSEQNO(x)	((u16)(((x) >> 48) & 0xffff))
-#define MREF_LE(x)	((unsigned long)(le64_to_cpu(x) & MFT_REF_MASK_CPU))
+#define MREF_LE(x)	((unsigned long)(le64_to_cpu(x) &		\
+					(u64)MFT_REF_MASK_CPU))
 #define MSEQNO_LE(x)	((u16)((le64_to_cpu(x) >> 48) & 0xffff))
 
 #define IS_ERR_MREF(x)	(((x) & 0x0000800000000000ULL) ? 1 : 0)