Fix some warnings triggered by gcc 4.6 -Wunused-but-set-variable

src/libstrongswan/plugins/af_alg/af_alg_prf.c

@@ -90,7 +90,7 @@ void af_alg_prf_probe(char *plugin)
 /**
  * Get the kernel algorithm string and block size for our identifier
  */
-static size_t lookup_alg(integrity_algorithm_t algo, char **name, bool *xcbc)
+static size_t lookup_alg(pseudo_random_function_t algo, char **name, bool *xcbc)
 {
 	int i;
 

src/libstrongswan/plugins/agent/agent_private_key.c

@@ -161,7 +161,7 @@ static int open_connection(char *path)
  */
 static bool read_key(private_agent_private_key_t *this, public_key_t *pubkey)
 {
-	int len, count;
+	int len;
 	char buf[2048];
 	chunk_t blob, key, type, n;
 
@@ -184,7 +184,7 @@ static bool read_key(private_agent_private_key_t *this, public_key_t *pubkey)
 		DBG1(DBG_LIB, "received invalid ssh-agent identity response");
 		return FALSE;
 	}
-	count = read_uint32(&blob);
+	read_uint32(&blob);
 
 	while (blob.len)
 	{

src/libstrongswan/plugins/gcrypt/gcrypt_rsa_private_key.c

@@ -504,7 +504,7 @@ gcrypt_rsa_private_key_t *gcrypt_rsa_private_key_load(key_type_t type,
 													  va_list args)
 {
 	private_gcrypt_rsa_private_key_t *this;
-	chunk_t n, e, d, p, q, exp, u;
+	chunk_t n, e, d, p, q, u;
 	gcry_error_t err;
 
 	n = e = d = p = q = u = chunk_empty;
@@ -531,7 +531,7 @@ gcrypt_rsa_private_key_t *gcrypt_rsa_private_key_load(key_type_t type,
 			case BUILD_RSA_EXP1:
 			case BUILD_RSA_EXP2:
 				/* not required for gcrypt */
-				exp = va_arg(args, chunk_t);
+				va_arg(args, chunk_t);
 				continue;
 			case BUILD_RSA_COEFF:
 				u = va_arg(args, chunk_t);