Fix error message typo, wrong function code

Reviewed-by: Matt Caswell <matt@openssl.org>

ssl/statem/statem.c

diff --git a/ssl/statem/statem.c b/ssl/statem/statem.c
index 8bc1feb..5faf6ae 100644
--- a/ssl/statem/statem.c
+++ b/ssl/statem/statem.c
@@ -549,7 +549,7 @@
                                            (int)s->s3->tmp.message_size
                                            + SSL3_HM_HEADER_LENGTH)) {
                 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
-                SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB);
+                SSLerr(SSL_F_READ_STATE_MACHINE, ERR_R_BUF_LIB);
                 return SUB_STATE_ERROR;
             }