GtkRcPropertyParser for use with gtkSettingsInstallPropertyParser
or gtkWidgetClassInstallStylePropertyParser which parses
borders in the form
"{ left, right, top, bottom }" for integers
left, right, top and bottom.gtkRcPropertyParseBorder(pspec, gstring)pspecgstringcharacter to be parsedTRUE if gstring could be parsed and property.value
has been set to the resulting GtkBorder.property.valueR object which must hold boxed values.