adding left indent to <programlisting> -- SOLVED!

["Robert P. J. Day" <rpjday@mindspring.com>]

  took a chance and added the customization

<xsl:template match="programlisting">
 <fo:block start-indent="0.25in">
  <xsl:apply-imports/>
 </fo:block>
</xsl:template>

  it *seems* to work, and doesn't even munge the contents of the
element (still monospaced, left justified, etc.)

  are there are non-obvious drawbacks to the above?  if not,
it clearly represents a better solution than my recent posting,
which did really bad things to the content (for reasons i still
don't understand).

rday