Consistently use 'void *' for SSL read, peek and write functions.

ssl/s3_lib.c

diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index e9aae56..31f4f80 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -1615,7 +1615,7 @@
 	return ssl3_read_internal(s, buf, len, 0);
 	}
 
-int ssl3_peek(SSL *s, char *buf, int len)
+int ssl3_peek(SSL *s, void *buf, int len)
 	{
 	return ssl3_read_internal(s, buf, len, 1);
 	}