reftests: Fix one reftest

The xalign property of GtkLabel defaults to 0.5,
meaning that the contents will be centered, which
is not what GtkInscription does.

gtk/gtklabel.c

@@ -1333,10 +1333,9 @@ get_layout_location (GtkLabel  *self,
     xalign = 1.0 - xalign;
 
   pango_layout_get_pixel_extents (self->layout, NULL, &logical);
-  if (pango_layout_get_width (self->layout) > 0)
+  x = floor ((xalign * (widget_width - logical.width)) - logical.x);
+  if (x < 0)
     x = 0.f;
-  else
-    x = floor ((xalign * (widget_width - logical.width)) - logical.x);
 
   baseline = gtk_widget_get_baseline (widget);
   if (baseline != -1)

testsuite/reftests/inscription-markup.ref.ui

@@ -8,6 +8,7 @@
       <object class="GtkLabel">
         <property name="use-markup">1</property>
         <property name="wrap">1</property>
+        <property name="xalign">0</property>
         <property name="label" translatable="yes">Text sizes: &lt;span size="xx-small"&gt;tiny &lt;/span&gt;&lt;span size="x-small"&gt;very small &lt;/span&gt;&lt;span size="small"&gt;small &lt;/span&gt;&lt;span size="medium"&gt;normal &lt;/span&gt;&lt;span size="large"&gt;large &lt;/span&gt;&lt;span size="x-large"&gt;very large &lt;/span&gt;&lt;span size="xx-large"&gt;huge&lt;/span&gt;
 Text styles: &lt;span style="normal"&gt;Normal&lt;/span&gt; &lt;span style="italic"&gt;Italic&lt;/span&gt; &lt;span style="oblique"&gt;Olique&lt;/span&gt;
 Text weights: &lt;span weight="thin"&gt;thin&lt;/span&gt; &lt;span weight="light"&gt;light&lt;/span&gt; &lt;span weight="normal"&gt;normal&lt;/span&gt; &lt;span weight="bold"&gt;bold&lt;/span&gt; &lt;span weight="ultraheavy"&gt;ultraheavy&lt;/span&gt;