title: Sphinx indexer creates an empty index when i specify more than 4 attributes in sphinx.conf
body: <p>I have an index 'colors' with the following configuration:</p>
  
  <pre><code>source colorsmain {
      type = mysql
      sql_host = 127.0.0.1
      sql_port = 3306
      sql_user = xxxx
      sql_pass = xxxx
      sql_db = showroom
      sql_query_range = SELECT MIN(id), MAX(id) from `colors`
      sql_range_step = 5000
      sql_query = SELECT id, affiliateproductid, h, s, b, w FROM colors WHERE id &gt;= $start AND id &lt;= $end
      sql_attr_uint = affiliateproductid
      sql_attr_uint = h
      sql_attr_uint = s
      sql_attr_uint = b
      sql_attr_uint = w
  }
  index colors {
      source = colorsmain
      path = /usr/local/etc/specifycolors
      docinfo = extern
      charset_type = utf-8
      mlock = 1
      preopen = 1
  }
  </code></pre>
  
  <p>When I run indexer, however, it returns the following:</p>
  
  <pre><code>using config file '/usr/local/etc/sphinx.conf'...
  indexing index 'colors'...
  collected 335350 docs, 0.0 MB
  total 335350 docs, 0 bytes
  total 1.184 sec, 0 bytes/sec, 283034.47 docs/sec
  total 0 reads, 0.000 sec, 0.0 kb/call avg, 0.0 msec/call avg
  total 4 writes, 0.000 sec, 0.0 kb/call avg, 0.0 msec/call avg
  </code></pre>
  
  <p>The odd part is that when I comment out any one of the sql_attr_uint lines, <em>it works just fine</em>:</p>
  
  <pre><code>using config file '/usr/local/etc/sphinx.conf'...
  indexing index 'colors'...
  collected 335350 docs, 0.6 MB
  sorted 0.3 Mhits, 100.0% done
  total 335350 docs, 600998 bytes
  total 1.428 sec, 420646 bytes/sec, 234715.82 docs/sec
  total 2 reads, 0.011 sec, 4295.3 kb/call avg, 5.5 msec/call avg
  total 7 writes, 0.017 sec, 2595.9 kb/call avg, 2.5 msec/call avg
  </code></pre>
  
  <p>I don't see anything in the sphinx docs regarding a limit to the number of attributes, and the attributes all seem in work in various combinations as long as i don't exceed 4 of them. Any advice?</p>
  
  <p>I'm running sphinx 0.9.9-release (r2117) on Mac OS X 10.6.6</p>
  
  <p>Thanks!</p>