<stdio.h> shouldn't be required

src/libsodium/crypto_pwhash/argon2/argon2-core.c

@@ -12,8 +12,8 @@
  */
 
 #include <errno.h>
+#include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 

src/libsodium/crypto_pwhash/argon2/argon2-encoding.c

@@ -2,7 +2,7 @@
 #include "argon2-core.h"
 #include "utils.h"
 #include <limits.h>
-#include <stdio.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 

src/libsodium/crypto_pwhash/argon2/argon2.c

@@ -12,8 +12,8 @@
  */
 
 #include <limits.h>
+#include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 

src/libsodium/include/sodium/crypto_onetimeauth_poly1305.h

@@ -1,8 +1,8 @@
 #ifndef crypto_onetimeauth_poly1305_H
 #define crypto_onetimeauth_poly1305_H
 
+#include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 
 #include <sys/types.h>