[gcanvas] help-patch error

[umlaeute]

the help-patch for [gcanvas] throws an error on opening (most likely because of the [gcanvas] hidden in the [pd resizing])

[electrickery]

The object gets a [size( message triggered by [loadbang]. The objects is not properly initialized at that time, I assume. Made a simple fix, blocking messages before the first 'vis'-event is received. Have to study on a proper fix. More GUI objects could have this problem.

[reduzent]

It seems it throws the following error when messages are sent to it while it is inside a hidden window:

(Tcl) INVALID COMMAND NAME: invalid command name ".x55a5ba9d2710.c"
    while executing
".x55a5ba9d2710.c coords 55a5baa0be300 69 129 149 209"
    ("uplevel" body line 2)
    invoked from within
"uplevel #0 $docmds"

[danomatika]

It should probably check the visibility status of the canvas before sending.