Add tcl::oo for Tcl 9.

Author: Poor Yorick

modules/virtchannel_base/string.tcl

@@ -26,7 +26,9 @@
 # # ## ### ##### ######## #############
 
 package require Tcl 8.5 9
-package require TclOO
+if {[catch {package require tcl::oo}]} {
+	package require TclOO
+}
 package require tcl::chan::events
 
 # # ## ### ##### ######## #############

modules/virtchannel_core/core.tcl

@@ -22,7 +22,9 @@
 # # ## ### ##### ######## #############
 
 package require Tcl 8.5 9
-package require TclOO
+if {[catch {package require tcl::oo}]} {
+	package require TclOO
+}
 
 # # ## ### ##### ######## #############
 

modules/virtchannel_core/events.tcl

@@ -27,7 +27,9 @@
 # # ## ### ##### ######## #############
 
 package require Tcl 8.5 9
-package require TclOO
+if {[catch {package require tcl::oo}]} {
+	package require TclOO
+}
 package require tcl::chan::core
 
 # # ## ### ##### ######## #############