Always specify the direction of input method arguments in introspection,...

Always specify the direction of input method arguments in introspection, otherwise the 'qdbusviewer' tool does not work.

[GB.DBUS]
* BUG: Always specify the direction of input method arguments in introspection, otherwise the 'qdbusviewer' tool does not work.

gb.dbus/src/gb.dbus/.project

 # Gambas Project File 3.0
 Title=gb.dbus
 Startup=MMain
-Version=3.11.90
+Version=3.13.90
 VersionFile=1
 Component=gb.dbus
 TabSize=2

gb.dbus/src/gb.dbus/.src/DBusObject.class

@@ -387,7 +387,7 @@ Public Sub _Introspect() As String
         sArg = ""
 
         For iInd = 0 To aSign.Max
-          sArg &= "      <arg name=\"arg" & CStr(iInd + 1) & "\" type=\"" & aSign[iInd] & "\"/>\n"
+          sArg &= "      <arg name=\"arg" & CStr(iInd + 1) & "\" type=\"" & aSign[iInd] & "\" direction=\"in\"/>\n"
         Next
 
         If sKind = Class.Event Then