Prefer calloc over malloc

This makes the code cleaner anyway and avoids branching.

Author: Rose

print-esp.c

@@ -132,10 +132,7 @@ EVP_CIPHER_CTX_new(void)
 {
 	EVP_CIPHER_CTX *ctx;
 
-	ctx = malloc(sizeof(*ctx));
-	if (ctx == NULL)
-		return (NULL);
-	memset(ctx, 0, sizeof(*ctx));
+	ctx = calloc(1, sizeof(*ctx));
 	return (ctx);
 }