cleanup: fix two empty expression statement has no effect

Follow-up to 26e46617b9

1 files changed, 8 insertions, 5 deletions

diff --git a/lib/sha256.c b/lib/sha256.c
index c64ee0936..d91511791 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -344,11 +344,14 @@ static int sha256_compress(struct sha256_state *md,
   }
 
   /* Compress */
-#define RND(a,b,c,d,e,f,g,h,i)                                  \
-  unsigned long t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
-  unsigned long t1 = Sigma0(a) + Maj(a, b, c);                  \
-  d += t0;                                                      \
-  h = t0 + t1;
+#define RND(a,b,c,d,e,f,g,h,i)                                          \
+  do {                                                                  \
+    unsigned long t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i];       \
+    unsigned long t1 = Sigma0(a) + Maj(a, b, c);                        \
+    d += t0;                                                            \
+    h = t0 + t1;                                                        \
+  } while(0)
+
   for(i = 0; i < 64; ++i) {
     unsigned long t;
     RND(S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i);