Use a different "unicoder" for db strings

It seems that running encoder.encode() on a latin1/latin9 string results
in, yes a bloody UnicodeDecodeError. Decode error on .encode()...
Really. This way the modification from non-unicode string to real
unicode appears to work better.

pyfpdb/Charset.py

@@ -33,7 +33,8 @@ def to_utf8(s):
     if not_needed: return s
 
     try:
-        (_out, _len) = encoder_to_utf.encode(s)
+        #(_out, _len) = encoder_to_utf.encode(s)
+        _out = unicode(s, Configuration.LOCALE_ENCODING).encode('utf-8')
         return _out
     except UnicodeDecodeError:
         print 'Could not convert: "%s"' % s