[PD-dev] Tcl entry box broken in pd-gui-rewrite 0.43

Hey IOhannes,

With the latest revision of pd-gui-rewrite branch, the Tcl entry box is broken. I am guessing something in your recent commits broke it. It gets caught up on the validation. To reproduce, try typing code into the Tcl entry box, I get a Tcl exception that I can't get out of:

wrong # args: should be "info message" wrong # args: should be "info message" while executing "info complete $tclentry" (procedure "::pdwindow::validate_tcl" line 3) invoked from within ""::pdwindow::validate_tcl"" (command bound to event)

.hc

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