Fix expension of macros in pointers with default values.

For example :

in xsl decl widget_class(%name, *clsname="%nameWidget", match="widget[@type='%name']", mode="widget_class") alias template {
| class `text **clsname` extends Widget{
content;
| }
};

widget_class('Input');

gives now :

<xsl:template match="widget[@type='Input']" mode="widget_class">
<xsl:text>class </xsl:text>
<xsl:text>InputWidget</xsl:text>
<xsl:text> extends Widget{
</xsl:text>
<xsl:text>}
</xsl:text>
</xsl:template>

Without the fix, <xsl:text>InputWidget</xsl:text> would be <xsl:text>%nameWidget</xsl:text>

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include yslt.yml2

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tstylesheet {

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    template "/list" {

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        apply "address", 0;

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        | 1000 FOR I=1 TO 2 STEP 1

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        | 1010 READ NAME$, STREET$, VILLAGE$

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        | 1020 PRINT "INSERT INTO address (name, street, village) VALUES ('" + NAME$ + "', '" + STREET$ + "', '" + VILLAGE$ + "');"

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        | 1030 NEXT I

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    }

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    template "address" {

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        | «position() * 10 + 100» DATA "«name»", "«street»", "«village»"

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    }

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}

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