Fix "No such file or directory" when connecting to ports >= 32768 (#1602)

* Fix `connect` for port numbers >=32768:

Since 5.0.0, using a high enough port number gives a "No such file or directory" error, because type casts treat high ports as -ve which awkwardly triggers the unix-socket-path behaviour.

* clean up guard condition

1 files changed, 1 insertions, 1 deletions

diff --git a/common.h b/common.h
index 45e8768f..0cb75173 100644
--- a/common.h
+++ b/common.h
@@ -248,7 +248,7 @@ typedef struct fold_item {
 typedef struct {
     php_stream        *stream;
     zend_string       *host;
-    short             port;
+    unsigned short    port;
     zend_string       *auth;
     double            timeout;
     double            read_timeout;