[Padre-dev] Missing stupid duplication in ToolBar.pm - rev. 2860

[G. J. Hazai]

With original line "$DB::single = 1" the error was in test:

#   Failed test 'STDERR of lib/Padre/Wx/ToolBar.pm'
#   at t/00-compile.t line 29.
#          got: 'Name "DB::single" used only once: possible typo at 
lib/Padre/Wx/ToolBar.pm line 258.
# lib/Padre/Wx/ToolBar.pm syntax OK
# '
#     expected: 'lib/Padre/Wx/ToolBar.pm syntax OK
# '

After "stupid duplication" ($DB::single = $DB::single = 1) ran w/o warning. 
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