widget: Fix measure docs
Fix a typo and don't ever pass NULL to a ::measure() implementation.
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@@ -191,16 +191,16 @@
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* {
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* if (i_am_in_height_for_width_mode)
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* {
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* int min_width;
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* int min_width, dummy;
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*
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* // First, get the minimum width of our widget
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* GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
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* &min_width, NULL, NULL, NULL);
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* &min_width, &dummy, &dummy, &dummy);
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*
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* // Now use the minimum width to retrieve the minmimum and natural height to display
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* // Now use the minimum width to retrieve the minimum and natural height to display
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* // that width.
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* GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_VERTICAL, min_width,
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* minimum_size, natural_size, NULL, NULL);
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* minimum_size, natural_size, &dummy, &dummy);
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* }
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* else
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* {
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