Move SCT_LIST_free definition into a more logical place

This reflects its position in include/openssl/ct.h.
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1548)

crypto/ct/ct_oct.c

@@ -254,11 +254,6 @@ err:
     return -1;
 }
 
-void SCT_LIST_free(STACK_OF(SCT) *a)
-{
-    sk_SCT_pop_free(a, SCT_free);
-}
-
 STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
                             size_t len)
 {

crypto/ct/ct_sct.c

@@ -45,6 +45,11 @@ void SCT_free(SCT *sct)
     OPENSSL_free(sct);
 }
 
+void SCT_LIST_free(STACK_OF(SCT) *a)
+{
+    sk_SCT_pop_free(a, SCT_free);
+}
+
 int SCT_set_version(SCT *sct, sct_version_t version)
 {
     if (version != SCT_VERSION_V1) {