Change functions to ANSI C.

crypto/evp/m_null.c

@@ -62,7 +62,7 @@
 #include "objects.h"
 #include "x509.h"
 
-static void function()
+static void function(void)
 	{
 	}
 
@@ -80,7 +80,7 @@ static EVP_MD null_md=
 	sizeof(EVP_MD *),
 	};
 
-EVP_MD *EVP_md_null()
+EVP_MD *EVP_md_null(void)
 	{
 	return(&null_md);
 	}