Sparse fixes: truncation by cast

Fix Sparse warnings about constant truncation caused by cast


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6737 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/bswap.h b/bswap.h
index 63b81cc..1dd357e 100644
--- a/bswap.h
+++ b/bswap.h
@@ -151,7 +151,7 @@
 {
     uint8_t *p1 = (uint8_t *)p;
 
-    p1[0] = v;
+    p1[0] = v & 0xff;
     p1[1] = v >> 8;
 }
 
@@ -159,7 +159,7 @@
 {
     uint8_t *p1 = (uint8_t *)p;
 
-    p1[0] = v;
+    p1[0] = v & 0xff;
     p1[1] = v >> 8;
     p1[2] = v >> 16;
     p1[3] = v >> 24;
@@ -188,7 +188,7 @@
     uint8_t *p1 = (uint8_t *)p;
 
     p1[0] = v >> 8;
-    p1[1] = v;
+    p1[1] = v & 0xff;
 }
 
 static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
@@ -198,7 +198,7 @@
     p1[0] = v >> 24;
     p1[1] = v >> 16;
     p1[2] = v >> 8;
-    p1[3] = v;
+    p1[3] = v & 0xff;
 }
 
 #endif