Correct CheckPort in JackAPI.cpp.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@1707 0c269be4-1314-0410-8aa9-9f06e86f4224

ChangeLog

@@ -15,6 +15,10 @@ Kjetil S.Matheussen
   Jackdmp changes log
 ---------------------------
 
+2007-11-20 Stephane Letz  <letz@grame.fr>
+
+	* Correct CheckPort in JackAPI.cpp.
+
 2007-11-15 Stephane Letz  <letz@grame.fr>
 
 	* Move OSX start/stop notification mechanism in Jackdmp.cpp.

common/JackAPI.cpp

@@ -221,7 +221,7 @@ inline double rint(double nr)
 
 static inline bool CheckPort(jack_port_id_t port_index)
 {
-    return (port_index < PORT_NUM);
+    return (port_index > 0 && port_index < PORT_NUM);
 }
 
 static inline bool CheckBufferSize(jack_nframes_t buffer_size)