Fix some warnings.

crypto/asn1/a_type.c

@@ -87,7 +87,8 @@ int ASN1_TYPE_set1(ASN1_TYPE *a, int type, const void *value)
 	{
 	if (!value || (type == V_ASN1_BOOLEAN))
 		{
-		ASN1_TYPE_set(a, type, (void *)value);
+		void *p = (void *)value;
+		ASN1_TYPE_set(a, type, p);
 		}
 	else if (type == V_ASN1_OBJECT)
 		{

crypto/cms/cms_asn1.c

@@ -309,6 +309,8 @@ static int cms_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 	CMS_ContentInfo *cms;
 	if (pval)
 		cms = (CMS_ContentInfo *)*pval;
+	else
+		return 1;
 	switch(operation)
 		{
 

crypto/hmac/hm_pmeth.c

@@ -206,8 +206,9 @@ static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
 		}
 	if (!strcmp(type, "key"))
 		{
+		void *p = (void *)value;
 		return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
-				-1, (void *)value);
+				-1, p);
 		}
 	if (!strcmp(type, "hexkey"))
 		{