Use print_r rather than var_dump when outputting queries to debug log

I observed my query log is full of stuff like this

$Query = <pre class='xdebug-var-dump' dir='ltr'><small>string</small> <font color='#cc0000'>'SELECT * FROM civicrm_component '</font> <i>(length=45)</i>

when I have 'CIVICRM_DEBUG_LOG_QUERY' defined.

The reason is the debug_var function has this little section

``
if ($print)

{ $out = print_r($variable, TRUE); $out = "\$$variable_name = $out"; }

else

{ // use var_dump ob_start(); var_dump($variable); $dump = ob_get_contents(); ob_end_clean(); $out = "\n\$$variable_name = $dump"; }

``

I can't see an advantage of the var_dump sequence over $print so am submitting a patch to pass in $print as TRUE