Correct control.h header.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3536 0c269be4-1314-0410-8aa9-9f06e86f4224

common/jack/control.h

@@ -31,6 +31,7 @@
 
 #include <jack/jslist.h>
 #include <jack/systemdeps.h>
+#include <stdbool.h>
 
 /** Parameter types, intentionally similar to jack_driver_param_type_t */
 typedef enum