[git commit] suppress a "integer overflow in expression" waring on big endian. Closes 4405

[Denys Vlasenko]

commit: http://git.busybox.net/busybox/commit/?id=b8ff9357d579913a5c699d89b4126d859590eea3
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 include/bb_archive.h |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/bb_archive.h b/include/bb_archive.h
index 9e176d3..d1a9a34 100644
--- a/include/bb_archive.h
+++ b/include/bb_archive.h
@@ -12,9 +12,10 @@ enum {
 	/* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
 	/* More info at: http://tukaani.org/xz/xz-file-format.txt */
 	XZ_MAGIC1   = 256 * 0xfd + '7',
-	XZ_MAGIC2   = 256 * (256 * (256 * 'z' + 'X') + 'Z') + 0,
+	XZ_MAGIC2   = 256 * (unsigned)(256 * (256 * 'z' + 'X') + 'Z') + 0,
 	/* Different form: 32 bits, then 16 bits: */
-	XZ_MAGIC1a  = 256 * (256 * (256 * 0xfd + '7') + 'z') + 'X',
+	/* (unsigned) cast suppresses "integer overflow in expression" warning */
+	XZ_MAGIC1a  = 256 * (unsigned)(256 * (256 * 0xfd + '7') + 'z') + 'X',
 	XZ_MAGIC2a  = 256 * 'Z' + 0,
 #else
 	COMPRESS_MAGIC = 0x9d1f,