[dev] increase debug error

[steve]

Here is a patch for lib/Form.php to get a better error message:
diff -w -b -r1.204 Form.php
125c125
<             Horde::fatal(PEAR::raiseError(sprintf('Inexistant class for 
field type "%s"', $type)), __FILE__, __LINE__);
---
 >             Horde::fatal(PEAR::raiseError(sprintf('Inexistant class "%s" 
for field type "%s"', $type_class, $type)), __FILE__, __LINE__);