Fix for Issue2550609

diff -r e75f622180a6 -r 8f2e377cdeea roundup/backends/indexer_rdbms.py
--- a/roundup/backends/indexer_rdbms.py	Wed Oct 21 09:57:36 2009 +0000
+++ b/roundup/backends/indexer_rdbms.py	Tue Nov 24 14:52:57 2009 -0500
@@ -64,8 +64,12 @@
             self.db.cursor.execute(sql, (id, ))
 
         # ok, find all the unique words in the text
-        text = unicode(text, "utf-8", "replace").upper()
-        wordlist = [w.encode("utf-8")
+        def tryencode(str):
+            if not isinstance(str, unicode):
+                str = str.encode("utf-8", "eplace")
+            return str
+        text = tryencode(text).upper()
+        wordlist = [ tryencode(w)
             for w in re.findall(r'(?u)\b\w{%d,%d}\b'
                                 % (self.minlength, self.maxlength), text)]
         words = set()