[v1.25] invalid after png_start_read_image or png_read_update_info

[Horst Kronstorfer]

hi!

running version 1.25 on fedora 21 with ...

• tcl 8.6.3
• tcllib 1.15
• tk 8.6.3
• tkimg 1.4
• sqlite-tcl 3.8.8

... i get the following application error when clicking on either the 'open existing ...' or the 'create new ...' button:

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invalid after png_start_read_image or png_read_update_info
invalid after png_start_read_image or png_read_update_info
while executing
"image create photo -data {
iVBORw0KGgoAAAANSUhEUgAAABYAAAAWCAYAAADEtGw7AAAABmJLR0QA/gD+AP7rGN
SCAAAACXBIWXMAAA3WAAAN1gGQb3mcAAAACXZwQWcAAAAW..."
(in namespace eval "::tk::dialog::file" script line 8)
invoked from within
"namespace eval ::tk::dialog::file {
namespace import -force ::tk::msgcat::*
variable showHiddenBtn 0
variable showHiddenVar 1

# Creat..."
(file "/usr/share/tk8.6/tkfbox.tcl" line 20)
invoked from within
"source /usr/share/tk8.6/tkfbox.tcl"
(in namespace eval "::" script line 1)
invoked from within
"namespace eval :: $auto_index($name)"
(procedure "auto_load" line 13)
invoked from within
"auto_load $name [uplevel 1 {::namespace current}]"
(autoloading "::tk::dialog::file::")
(procedure "::unknown" line 22)
invoked from within
"::tk::dialog::file:: open {*}$args"
(procedure "tk_getOpenFile" line 5)
invoked from within
"tk_getOpenFile -parent $parent -initialdir $dir "
(procedure "ds::requestopath" line 3)
invoked from within
"ds::requestopath main .intro "
(procedure "ui::intro.open" line 2)
invoked from within
"ui::intro.open"
invoked from within
".intro.root.open invoke "
invoked from within
".intro.root.open instate !disabled { .intro.root.open invoke } "
invoked from within
".intro.root.open instate pressed { .intro.root.open state !pressed; .intro.root.open instate !disabled { .intro.root.open invoke } } "
(command bound to event)

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regards