vtls: Fixed compilation warning and an ignored return code

curl_schannel.h:123: warning: right-hand operand of comma expression
                     has no effect

Some instances of the curlssl_close_all() function were declared with a
void return type whilst others as int. The schannel version returned
CURLE_NOT_BUILT_IN and others simply returned zero, but in all cases the
return code was ignored by the calling function Curl_ssl_close_all().

For the time being and to keep the internal API consistent, changed all
declarations to use a void return type.

To reduce code we might want to consider removing the unimplemented
versions and use a void #define like schannel does.

1 files changed, 1 insertions, 2 deletions

diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index 0d133107b..ac05f05bb 100644
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -986,11 +986,10 @@ void Curl_gskit_close(struct connectdata *conn, int sockindex)
 }
 
 
-int Curl_gskit_close_all(struct SessionHandle *data)
+void Curl_gskit_close_all(struct SessionHandle *data)
 {
   /* Unimplemented. */
   (void) data;
-  return 0;
 }