Only fetch globals if it's necessary (which it usually won't be)

sapi/cgi/cgi_main.c

@@ -87,10 +87,11 @@ extern int ap_php_optind;
 static int sapi_cgibin_ub_write(const char *str, uint str_length)
 {
 	int ret;
-	PLS_FETCH();
 
 	ret = fwrite(str, 1, str_length, stdout);
 	if (ret != str_length) {
+		PLS_FETCH();
+
 		PG(connection_status) = PHP_CONNECTION_ABORTED;
 		if (!PG(ignore_user_abort)) {
 			zend_bailout();
@@ -103,9 +104,9 @@ static int sapi_cgibin_ub_write(const char *str, uint str_length)
 
 static void sapi_cgibin_flush(void *server_context)
 {
-	PLS_FETCH();
+	if (fflush(stdout)==EOF) {
+		PLS_FETCH();
 
-	if (fflush(stdout)) {
 		PG(connection_status) = PHP_CONNECTION_ABORTED;
 		if (!PG(ignore_user_abort)) {
 			zend_bailout();