crypto: ahash - fixed style error in ahash.c

Fixed style error identified by checkpatch.

WARNING: Missing a blank line after declarations
+               unsigned int unaligned = alignmask + 1 - (offset & alignmask);
+               if (nbytes > unaligned)

Signed-off-by: Joshua I. James <joshua@cybercrimetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/ahash.c b/crypto/ahash.c
index f6a36a5..dd28906 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -55,6 +55,7 @@
 
 	if (offset & alignmask) {
 		unsigned int unaligned = alignmask + 1 - (offset & alignmask);
+
 		if (nbytes > unaligned)
 			nbytes = unaligned;
 	}