Remove misleading dead code. Constify. (Coverity ID 142)

crypto/dsa/dsa_locl.h

diff --git a/crypto/dsa/dsa_locl.h b/crypto/dsa/dsa_locl.h
index f1bbf72..2b8cfee 100644
--- a/crypto/dsa/dsa_locl.h
+++ b/crypto/dsa/dsa_locl.h
@@ -55,5 +55,5 @@
 #include <openssl/dsa.h>
 
 int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
-	const EVP_MD *evpmd, unsigned char *seed_in, size_t seed_len,
+	const EVP_MD *evpmd, const unsigned char *seed_in, size_t seed_len,
 	int *counter_ret, unsigned long *h_ret, BN_GENCB *cb);